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CVE-2026-90774

rustypaste before 0.18.1 Path Traversal via filename header

CVSS 4.0 8.7 HIGHCVSS 3.1 7.5 HIGHCheck source for fixed versionsKEV status unknown

Original advisory

Historical advisory recorded 23 Oct 2026 15:48:27 UTC. Read the latest advisory.

cve-program · CVE-2026-90774

Published

rustypaste before 0.18.1 validates the destination path before applying the optional custom filename HTTP header, allowing attackers to bypass directory-escape checks. Attackers can supply path traversal sequences in the filename header to write files outside the configured upload directory to arbitrary locations.

Read the publisher's advisory

Affected versions, risk and source history

cve-program · CVE-2026-90774

Published

rustypaste

Vendor product

Publisher's version information

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

{
                    "vendor": "orhun",
                    "product": "rustypaste",
                    "defaultStatus": "unaffected",
                    "packageURL": "pkg:cargo/rustypaste",
                    "versions": [
                        {
                            "version": "0",
                            "lessThan": "0.18.1",
                            "status": "affected",
                            "versionType": "semver"
                        }
                    ]
                }

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