CVE-2026-101280CWE-287CWE-290

CVE-2026-101280

High · published September 29, 2026

CVSS v3.1
7.3
EPSS
0%
Percentile
33.3
In the wild
Unconfirmed
What it is

A vulnerability was detected in Trusted Domain Project OpenDMARC up to 1.4.2. Affected is the function opendmarc_policy_query_dmarc of the component Multi-Record Set Handler. The manipulation results in authentication bypass by spoofing. The attack can be executed remotely. The exploit is now 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
0.00402 · 33.3th percentile
Weaknesses
CWE-287 · Improper Authentication; CWE-290 · Authentication Bypass by Spoofing
Published
2026-09-29T05:16Z
References (5)
https://vuldb.com/cve/CVE-2026-101280 · [email protected]https://vuldb.com/submit/918282 · [email protected]https://vuldb.com/vuln/411037 · [email protected]https://vuldb.com/vuln/411037/cti · [email protected]https://xuyongzhe-vt.github.io/share/opendmarc-multi-record-downgrade.html · [email protected]
EPSS history
Timeline
  • 30 SEP 03:24Z
    EPSS moved — → 0%
    epss
  • 29 SEP 00:30Z
    Trusted Domain Project OpenDMARC Multi-Record Set opendmarc_policy_query_dmarc authentication spoofing
    cvelistv5