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Vulnerability · Published Sep 28, 2026 · Assigned by VulDB

CVE-2026-101277Trusted Domain Project OpenDKIM Tag Tokenizer dkim.c dkim_process_set less trusted source

Medium 6.5

In plain English

A medium-severity security flaw in OpenDKIM from Trusted Domain Project. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 9% of all known vulnerabilities).

Severity (CVSS 3.1)6.5Medium
Exploit odds (30 days)0.2%top 91.2% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known

Official description

A security flaw has been discovered in Trusted Domain Project OpenDKIM up to 2.11.0. The impacted element is the function dkim_process_set of the file dkim.c of the component Tag Tokenizer. Performing a manipulation results in use of less trusted source. The attack may be initiated remotely. The exploit has been released to the public and may be used for attacks. The vendor was contacted early about this disclosure but did not respond in any way.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12opendkimno fix listedDEBIAN-CVE-2026-101277
Debian:13opendkimno fix listedDEBIAN-CVE-2026-101277
Debian:14opendkimno fix listedDEBIAN-CVE-2026-101277
Ubuntu:22.04:LTSopendkimno fix listedUBUNTU-CVE-2026-101277
Ubuntu:24.04:LTSopendkimno fix listedUBUNTU-CVE-2026-101277
Ubuntu:26.04:LTSopendkimno fix listedUBUNTU-CVE-2026-101277
Ubuntu:26.10opendkimno fix listedUBUNTU-CVE-2026-101277

Affected products (as reported)

VendorProductVersions
Trusted Domain Project OpenDKIM 2.02.12.22.32.42.52.62.7

Weakness: CWE-348 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L/E:P/RL:X/RC:R

References