CVE-2026-100888

Description

A weakness has been identified in Trusted Domain Project OpenDKIM up to 2.11.0. This affects the function dkim_canon_selecthdrs of the file libopendkim/dkim-canon.c of the component DKIM Signature Header Selection. Executing a manipulation of the argument h can lead to out-of-bounds write. The attack can be executed remotely. The exploit has been made available to the public and could be used for attacks. The vendor was contacted early about this disclosure but did not respond in any way.

References

https://weitongli.com/share/opendkim-h-tag-oob-write.html

https://vuldb.com/vuln/410837/cti

https://vuldb.com/vuln/410837

https://vuldb.com/submit/917015

https://vuldb.com/cve/CVE-2026-100888

Details

Source: Mitre, NVD

Risk Information

CVSS v2

CVSS v3

CVSS v4

EPSS