CVE-2026-101281: Improper Authentication in Trusted Domain Project OpenDMARC
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.
AI Analysis
Technical Summary
This vulnerability affects the Trusted Domain Project OpenDMARC software up to version 1.4.2. The flaw exists in the opendmarc_sp2_find_mailfrom_domain function of the libopendmarc/opendmarc_spf.c file, part of the SPF Macro Handler component. It causes improper authentication, allowing remote attackers to exploit the issue. An exploit has been published publicly. The vendor has provided a patch (commit c48a74c758677fc5272a73eff15ffdbf8afda1a6) to remediate the vulnerability.
Potential Impact
The vulnerability allows remote attackers to bypass proper authentication mechanisms in OpenDMARC, potentially undermining SPF validation and email authentication processes. This could lead to unauthorized actions or spoofing within systems relying on OpenDMARC for domain-based message authentication.
Mitigation Recommendations
Apply the official patch identified by commit c48a74c758677fc5272a73eff15ffdbf8afda1a6 to affected OpenDMARC versions 1.4.0, 1.4.1, and 1.4.2. This patch addresses the improper authentication flaw. No other mitigation steps are indicated by the vendor advisory.
CVE-2026-101281: Improper Authentication in Trusted Domain Project OpenDMARC
Description
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.
CVSS v4.0
Score 6.9medium
Affected software
Trusted Domain Project
OpenDMARC
pkg:github/trusteddomainproject/OpenDMARCcpe:2.3:a:trusted_domain_project:opendmarc:*:*:*:*:*:*:*:*Run on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability affects the Trusted Domain Project OpenDMARC software up to version 1.4.2. The flaw exists in the opendmarc_sp2_find_mailfrom_domain function of the libopendmarc/opendmarc_spf.c file, part of the SPF Macro Handler component. It causes improper authentication, allowing remote attackers to exploit the issue. An exploit has been published publicly. The vendor has provided a patch (commit c48a74c758677fc5272a73eff15ffdbf8afda1a6) to remediate the vulnerability.
Potential Impact
The vulnerability allows remote attackers to bypass proper authentication mechanisms in OpenDMARC, potentially undermining SPF validation and email authentication processes. This could lead to unauthorized actions or spoofing within systems relying on OpenDMARC for domain-based message authentication.
Mitigation Recommendations
Apply the official patch identified by commit c48a74c758677fc5272a73eff15ffdbf8afda1a6 to affected OpenDMARC versions 1.4.0, 1.4.1, and 1.4.2. This patch addresses the improper authentication flaw. No other mitigation steps are indicated by the vendor advisory.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- VulDB
- Date Reserved
- 2026-09-28T11:52:51.804Z
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 6abb0e62f7a7c54106802fbe
Added to database: 09/29/2026, 01:03:30 UTC
Last enriched: 09/29/2026, 01:17:42 UTC
Last updated: 09/29/2026, 01:57:21 UTC
Views: 4
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