CVE-2026-101277 Trusted Domain Project OpenDKIM Tag Tokenizer dkim.c dkim_process_set less trusted source
Remote attackers can exploit a tag tokenizer flaw in OpenDKIM to use less trusted sources, potentially bypassing signature verification.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-101277?
CVE-2026-101277 is a medium-severity vulnerability in Trusted Domain Project OpenDKIM, published on 28 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
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.
Weakness: CWE-348
Which versions are affected by CVE-2026-101277?
How do I fix CVE-2026-101277?
No fix has been published for CVE-2026-101277 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-101277 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-101277 exists.
Sources
Also known as DEBIAN-CVE-2026-101277, GHSA-frgp-cm59-pw23, UBUNTU-CVE-2026-101277.