CVE-2026-100891CWE-172

CVE-2026-100891

High · published September 28, 2026

CVSS v3.1
7.3
EPSS
0%
Percentile
20.8
In the wild
Unconfirmed
What it is

A vulnerability has been found in Trusted Domain Project OpenDMARC up to 1.4.2. Affected by this issue is the function opendmarc_policy_query_dmarc in the library libopendmarc/opendmarc_policy.c of the component Internationalized Domain Name Handler. Such manipulation leads to encoding error. It is possible to launch the attack remotely. The exploit has been disclosed to the public and may be used. The vendor was contacted early about this disclosure but did not respond in any way.

The record
Technical detail
CVSS v3.1
7.3 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
CVSS v4.0
6.9 · CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P
EPSS
0.00293 · 20.8th percentile
Weakness
CWE-172 · Encoding Error
Published
2026-09-28T05:16Z
References (5)
https://vuldb.com/cve/CVE-2026-100891 · [email protected]https://vuldb.com/submit/917215 · [email protected]https://vuldb.com/vuln/410841 · [email protected]https://vuldb.com/vuln/410841/cti · [email protected]https://weitongli.com/share/opendmarc-ulabel-not-converted.html · [email protected]
EPSS history
Timeline
  • 02 OCT 03:41Z
    EPSS moved — → 0%
    epss
  • 28 SEP 00:15Z
    Trusted Domain Project OpenDMARC Internationalized Domain Name opendmarc_policy.c opendmarc_policy_query_dmarc encoding error
    cvelistv5