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CVE-2026-8458

wrong reuse for different services

cve-program · severity unknownCVSS unknownCheck source for fixed versionsKEV status unknown
Original advisory

cve-program · CVE-2026-8458

Published

libcurl might in some circumstances reuse the wrong connection when asked to do Negotiate-authenticated ones, even when they are set to use different "services". libcurl features a pool of recent connections so that subsequent requests can reuse an existing connection to avoid overhead. When reusing a connection a range of criteria must be met. Due to a logical error in the code, a request that was issued by an application could wrongfully reuse an existing connection to the same server that was authenticated using different services.

Read the publisher's advisory

Affected versions, risk and source history

cve-program · CVE-2026-8458

Published

curl

Vendor product

Publisher's version information

Shown as published. These rules are not interpreted as NuGet package version ranges.

{
                    "vendor": "curl",
                    "product": "curl",
                    "versions": [
                        {
                            "version": "7.43.0",
                            "status": "affected",
                            "versionType": "semver",
                            "lessThan": "8.14.2"
                        },
                        {
                            "version": "8.15.0",
                            "status": "affected",
                            "versionType": "semver",
                            "lessThan": "8.16.1"
                        },
                        {
                            "version": "8.17.0",
                            "status": "affected",
                            "versionType": "semver",
                            "lessThan": "8.20.1"
                        }
                    ],
                    "defaultStatus": "unaffected"
                }

curl

Vendor product

Publisher's version information

Shown as published. These rules are not interpreted as NuGet package version ranges.

{
                    "vendor": "curl",
                    "product": "curl",
                    "versions": [
                        {
                            "version": "97c272e5d173ad5f706443e2477f0a84f0044edd",
                            "status": "affected",
                            "versionType": "git",
                            "lessThan": "5e99b73cf441d9c369768b9cd48b5389b9a2503d"
                        }
                    ],
                    "defaultStatus": "unaffected",
                    "repo": "https://github.com/curl/curl.git"
                }

curl

Vendor product

Publisher's version information

Shown as published. These rules are not interpreted as NuGet package version ranges.

{
                    "vendor": "curl",
                    "product": "curl",
                    "versions": [
                        {
                            "version": "8.20.0",
                            "status": "affected"
                        },
                        {
                            "version": "8.19.0",
                            "status": "affected"
                        },
                        {
                            "version": "8.18.0",
                            "status": "affected"
                        },
                        {
                            "version": "8.17.0",
                            "status": "affected"
                        },
                        {
                            "version": "8.16.0",
                            "status": "affected"
                        },
                        {
                            "version": "8.15.0",
                            "status": "affected"
                        },
                        {
                            "version": "8.14.1",
                            "status": "affected"
                        },
                        {
                            "version": "8.14.0",
                            "status": "affected"
                        },
                        {
                            "version": "8.13.0",
                            "status": "affected"
                        },
                        {
                            "version": "8.12.1",
                            "status": "affected"
                        },
                        {
                            "version": "8.12.0",
                            "status": "affected"
                        },
                        {
                            "version": "8.11.1",
                            "status": "affected"
                        },
                        {
                            "version": "8.11.0",
                            "status": "affected"
                        },
                        {
                            "version": "8.10.1",
                            "status": "affected"
                        },
                        {
                            "version": "8.10.0",
                            "status": "affected"
                        },
                        {
                            "version": "8.9.1",
                            "status": "affected"
                        },
                        {
                            "version": "8.9.0",
                            "status": "affected"
                        },
                        {
                            "version": "8.8.0",
                            "status": "affected"
                        },
                        {
                            "version": "8.7.1",
                            "status": "affected"
                        },
                        {
                            "version": "8.7.0",
                            "status": "affected"
                        },
                        {
                            "version": "8.6.0",
                            "status": "affected"
                        },
                        {
                            "version": "8.5.0",
                            "status": "affected"
                        },
                        {
                            "version": "8.4.0",
                            "status": "affected"
                        },
                        {
                            "version": "8.3.0",
                            "status": "affected"
                        },
                        {
                            "version": "8.2.1",
                            "status": "affected"
                        },
                        {
                            "version": "8.2.0",
                            "status": "affected"
                        },
                        {
                            "version": "8.1.2",
                            "status": "affected"
                        },
                        {
                            "version": "8.1.1",
                            "status": "affected"
                        },
                        {
                            "version": "8.1.0",
                            "status": "affected"
                        },
                        {
                            "version": "8.0.1",
                            "status": "affected"
                        },
                        {
                            "version": "8.0.0",
                            "status": "affected"
                        },
                        {
                            "version": "7.88.1",
                            "status": "affected"
                        },
                        {
                            "version": "7.88.0",
                            "status": "affected"
                        },
                        {
                            "version": "7.87.0",
                            "status": "affected"
                        },
                        {
                            "version": "7.86.0",
                            "status": "affected"
                        },
                        {
                            "version": "7.85.0",
                            "status": "affected"
                        },
                        {
                            "version": "7.84.0",
                            "status": "affected"
                        },
                        {
                            "version": "7.83.1",
                            "status": "affected"
                        },
                        {
                            "version": "7.83.0",
                            "status": "affected"
                        },
                        {
                            "version": "7.82.0",
                            "status": "affected"
                        },
                        {
                            "version": "7.81.0",
                            "status": "affected"
                        },
                        {
                            "version": "7.80.0",
                            "status": "affected"
                        },
                        {
                            "version": "7.79.1",
                            "status": "affected"
                        },
                        {
                            "version": "7.79.0",
                            "status": "affected"
                        },
                        {
                            "version": "7.78.0",
                            "status": "affected"
                        },
                        {
                            "version": "7.77.0",
                            "status": "affected"
                        },
                        {
                            "version": "7.76.1",
                            "status": "affected"
                        },
                        {
                            "version": "7.76.0",
                            "status": "affected"
                        },
                        {
                            "version": "7.75.0",
                            "status": "affected"
                        },
                        {
                            "version": "7.74.0",
                            "status": "affected"
                        },
                        {
                            "version": "7.73.0",
                            "status": "affected"
                        },
                        {
                            "version": "7.72.0",
                            "status": "affected"
                        },
                        {
                            "version": "7.71.1",
                            "status": "affected"
                        },
                        {
                            "version": "7.71.0",
                            "status": "affected"
                        },
                        {
                            "version": "7.70.0",
                            "status": "affected"
                        },
                        {
                            "version": "7.69.1",
                            "status": "affected"
                        },
                        {
                            "version": "7.69.0",
                            "status": "affected"
                        },
                        {
                            "version": "7.68.0",
                            "status": "affected"
                        },
                        {
                            "version": "7.67.0",
                            "status": "affected"
                        },
                        {
                            "version": "7.66.0",
                            "status": "affected"
                        },
                        {
                            "version": "7.65.3",
                            "status": "affected"
                        },
                        {
                            "version": "7.65.2",
                            "status": "affected"
                        },
                        {
                            "version": "7.65.1",
                            "status": "affected"
                        },
                        {
                            "version": "7.65.0",
                            "status": "affected"
                        },
                        {
                            "version": "7.64.1",
                            "status": "affected"
                        },
                        {
                            "version": "7.64.0",
                            "status": "affected"
                        },
                        {
                            "version": "7.63.0",
                            "status": "affected"
                        },
                        {
                            "version": "7.62.0",
                            "status": "affected"
                        },
                        {
                            "version": "7.61.1",
                            "status": "affected"
                        },
                        {
                            "version": "7.61.0",
                            "status": "affected"
                        },
                        {
                            "version": "7.60.0",
                            "status": "affected"
                        },
                        {
                            "version": "7.59.0",
                            "status": "affected"
                        },
                        {
                            "version": "7.58.0",
                            "status": "affected"
                        },
                        {
                            "version": "7.57.0",
                            "status": "affected"
                        },
                        {
                            "version": "7.56.1",
                            "status": "affected"
                        },
                        {
                            "version": "7.56.0",
                            "status": "affected"
                        },
                        {
                            "version": "7.55.1",
                            "status": "affected"
                        },
                        {
                            "version": "7.55.0",
                            "status": "affected"
                        },
                        {
                            "version": "7.54.1",
                            "status": "affected"
                        },
                        {
                            "version": "7.54.0",
                            "status": "affected"
                        },
                        {
                            "version": "7.53.1",
                            "status": "affected"
                        },
                        {
                            "version": "7.53.0",
                            "status": "affected"
                        },
                        {
                            "version": "7.52.1",
                            "status": "affected"
                        },
                        {
                            "version": "7.52.0",
                            "status": "affected"
                        },
                        {
                            "version": "7.51.0",
                            "status": "affected"
                        },
                        {
                            "version": "7.50.3",
                            "status": "affected"
                        },
                        {
                            "version": "7.50.2",
                            "status": "affected"
                        },
                        {
                            "version": "7.50.1",
                            "status": "affected"
                        },
                        {
                            "version": "7.50.0",
                            "status": "affected"
                        },
                        {
                            "version": "7.49.1",
                            "status": "affected"
                        },
                        {
                            "version": "7.49.0",
                            "status": "affected"
                        },
                        {
                            "version": "7.48.0",
                            "status": "affected"
                        },
                        {
                            "version": "7.47.1",
                            "status": "affected"
                        },
                        {
                            "version": "7.47.0",
                            "status": "affected"
                        },
                        {
                            "version": "7.46.0",
                            "status": "affected"
                        },
                        {
                            "version": "7.45.0",
                            "status": "affected"
                        },
                        {
                            "version": "7.44.0",
                            "status": "affected"
                        },
                        {
                            "version": "7.43.0",
                            "status": "affected"
                        }
                    ],
                    "defaultStatus": "unaffected"
                }

Original source record · Cite this exact observation · Complete original publisher JSON

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