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CVE-2026-100889

Trusted Domain Project OpenDKIM Decoder util.c dkim_qp_decode off-by-one

CVSS 4.0 6.9 MEDIUMCVSS 3.1 7.3 HIGHCVSS 3.0 7.3 HIGHCVSS 2.0 7.5 Check 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-2026-100889

Published

A vulnerability was detected in Trusted Domain Project OpenDKIM up to 2.11.0. Affected is the function dkim_qp_decode of the file util.c of the component Decoder. The manipulation results in off-by-one. The attack may be performed from remote. The exploit is now public and may be used. The vendor was contacted early about this disclosure but did not respond in any way.

Read the publisher's advisory

Affected versions, risk and source history

cve-program · CVE-2026-100889

Published

OpenDKIM

Vendor product

Publisher's version information

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

{
                    "vendor": "Trusted Domain Project",
                    "product": "OpenDKIM",
                    "versions": [
                        {
                            "version": "2.0",
                            "status": "affected"
                        },
                        {
                            "version": "2.1",
                            "status": "affected"
                        },
                        {
                            "version": "2.2",
                            "status": "affected"
                        },
                        {
                            "version": "2.3",
                            "status": "affected"
                        },
                        {
                            "version": "2.4",
                            "status": "affected"
                        },
                        {
                            "version": "2.5",
                            "status": "affected"
                        },
                        {
                            "version": "2.6",
                            "status": "affected"
                        },
                        {
                            "version": "2.7",
                            "status": "affected"
                        },
                        {
                            "version": "2.8",
                            "status": "affected"
                        },
                        {
                            "version": "2.9",
                            "status": "affected"
                        },
                        {
                            "version": "2.10",
                            "status": "affected"
                        },
                        {
                            "version": "2.11.0",
                            "status": "affected"
                        }
                    ],
                    "cpes": [
                        "cpe:2.3:a:trusted_domain_project:opendkim:*:*:*:*:*:*:*:*"
                    ],
                    "modules": [
                        "Decoder"
                    ]
                }

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