Trusted Domain Project OpenDMARC up to 1.4.2 opendmarc_policy.c opendmarc_policy_parse_dmarc fo/rf/ri/pct/sp/adkim/aspf/rua/ruf exceptional condition

CVSS Meta Temp Score
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CTI Interest Score
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6.2$0-$5k0.92+

Summaryinfo

A vulnerability classified as critical was found in Trusted Domain Project OpenDMARC up to 1.4.2. This vulnerability affects the function opendmarc_policy_parse_dmarc in the library libopendmarc/opendmarc_policy.c. The manipulation of the argument fo/rf/ri/pct/sp/adkim/aspf/rua/ruf results in exceptional condition. This vulnerability is identified as CVE-2026-101016. The attack can be executed remotely. Additionally, an exploit exists. The vendor was contacted early about this disclosure but did not respond in any way.

Detailsinfo

A vulnerability classified as critical has been found in Trusted Domain Project OpenDMARC up to 1.4.2. Affected is the function opendmarc_policy_parse_dmarc in the library libopendmarc/opendmarc_policy.c. The manipulation of the argument fo/rf/ri/pct/sp/adkim/aspf/rua/ruf with an unknown input leads to a exceptional condition vulnerability. CWE is classifying the issue as CWE-755. The product does not handle or incorrectly handles an exceptional condition. This is going to have an impact on integrity, and availability.

The advisory is available at xuyongzhe-vt.github.io. This vulnerability is traded as CVE-2026-101016. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. Technical details and a public exploit are known.

The exploit is shared for download at xuyongzhe-vt.github.io. It is declared as proof-of-concept. The vendor was contacted early about this disclosure but did not respond in any way.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

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Productinfo

Type

Vendor

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.5
VulDB Meta Temp Score: 6.2

VulDB Base Score: 6.5
VulDB Temp Score: 6.2
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Exceptional condition
CWE: CWE-755
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Access: Public
Status: Proof-of-Concept
Download: 🔒
Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔒

Timelineinfo

09/27/2026 Advisory disclosed
09/27/2026 +0 days VulDB entry created
09/27/2026 +0 days VulDB entry last update

Sourcesinfo

Advisory: xuyongzhe-vt.github.io
Status: Confirmed

CVE: CVE-2026-101016 (🔒)
GCVE (CVE): GCVE-0-2026-101016
GCVE (VulDB): GCVE-100-410886
scip Labs: https://www.scip.ch/en/?labs.20161013

Entryinfo

Created: 09/27/2026 13:38
Changes: 09/27/2026 13:38 (57)
Complete: 🔍
Submitter: yongzhe_xu
Cache ID: 216::103

Submitinfo

Accepted

  • Submit #918242: The Trusted Domain Project OpenDMARC 1.4.2 Improper Authentication (by yongzhe_xu)

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