TI-2026-65175 Aliases CVE-2026-101281 GHSA-fvpv-g9f4-87fc

Trusted Domain Project OpenDMARC SPF Macro opendmarc_spf.c opendmarc_sp2_find_mailfrom_domain improper authentication

HIGH 70CWE-287Published 2026-09-29 · Updated 2026-10-01

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: Low
Attack requirements: None
Impact type: Security bypass
Confidentiality · integrity · availability: Low · Low · Low
Fix status: No fix listed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-287.

Summary

A flaw has been found in Trusted Domain Project OpenDMARC up to 1.4.2. Affected by this vulnerability is the function opendmarc_sp2_find_mailfrom_domain of the file libopendmarc/opendmarc_spf.c of the component SPF Macro Handler. This manipulation causes improper authentication. The attack is possible to be carried out remotely. The exploit has been published and may be used. Patch name: c48a74c758677fc5272a73eff15ffdbf8afda1a6. Applying a patch is the recommended action to fix this issue.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV

EPSS 0.00411 35th percentileScored 2026-11-07

Public exploit Yes 1 exploit referenceTagged by the CNA

Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: Poc
Automatable: Yes
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
Trusted Domain Project	OpenDMARC	1.4.0; 1.4.1; 1.4.2	—	No fix listed	CNA

OpenDMARC VendorTrusted Domain Project Affected 1.4.0; 1.4.1; 1.4.2 Fixed in — No fix listed CNA

CPE names CNA · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:trusted_domain_project:opendmarc::::::::	—	—	Trusted Domain Project

cpe:2.3:a:trusted_domain_project:opendmarc:*:*:*:*:*:*:*:* Versions — — ·Trusted Domain Project

Remediation

No fixed version listed by the sources yet.

Vendor assessments

Red Hat

Red Hat's page for this CVE →

Not affected: 1 product

Red Hat

Timeline

2026-10-02 Threatist record created from CVE-2026-101281
2026-10-03 Alias added: GHSA-fvpv-g9f4-87fc

References

Exploit 1

https://xuyongzhe-vt.github.io/share/opendmarc-spf-postmaster-macro.html

Patch 2

Other 1

https://github.com/trusteddomainproject/OpenDMARC/issues/262

TI-2026-65174 Trusted Domain Project OpenDMARC Multi-Record Set opendmarc_policy_query_dmarc authentication spoofing CVSS 4.0MEDIUM 6.9
TI-2026-65173 Trusted Domain Project OpenDMARC opendmarc_policy.c integer overflow CVSS 4.0MEDIUM 6.9
TI-2026-65171 Trusted Domain Project OpenDKIM Tag Tokenizer dkim.c dkim_process_set less trusted source CVSS 4.0MEDIUM 6.9
TI-2026-65064 Trusted Domain Project OpenDMARC opendmarc_policy.c strcasecmp exceptional condition CVSS 4.0MEDIUM 6.9
TI-2026-65063 Trusted Domain Project OpenDMARC opendmarc_policy.c opendmarc_policy_parse_dmarc exceptional condition CVSS 4.0MEDIUM 6.9
TI-2026-65062 Trusted Domain Project OpenDMARC policy.c improper validation of unsafe equivalence in input CVSS 4.0MEDIUM 6.9

See all 13 →

Sources

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