Trusted Domain Project OpenDMARC up to 1.4.2 policy.c improper validation of unsafe equivalence in input

CVSS Meta Temp Score
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CTI Interest Score
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6.9$0-$5k0.92+

Summaryinfo

A vulnerability classified as critical has been found in Trusted Domain Project OpenDMARC up to 1.4.2. This affects an unknown part of the file policy.c of the component Domain Handler. The manipulation leads to improper validation of unsafe equivalence in input. This vulnerability is referenced as CVE-2026-101015. Remote exploitation of the attack is possible. Furthermore, an exploit is available. The vendor was contacted early about this disclosure but did not respond in any way.

Detailsinfo

A vulnerability was found in Trusted Domain Project OpenDMARC up to 1.4.2. It has been rated as critical. This issue affects some unknown processing of the file policy.c of the component Domain Handler. The manipulation with an unknown input leads to a improper validation of unsafe equivalence in input vulnerability. Using CWE to declare the problem leads to CWE-1289. The product receives an input value that is used as a resource identifier or other type of reference, but it does not validate or incorrectly validates that the input is equivalent to a potentially-unsafe value. Impacted is confidentiality, integrity, and availability.

The advisory is shared at weitongli.com. The identification of this vulnerability is CVE-2026-101015. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Technical details as well as a public exploit are known.

The exploit is available at weitongli.com. 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: 7.3
VulDB Meta Temp Score: 6.9

VulDB Base Score: 7.3
VulDB Temp Score: 6.9
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: Improper validation of unsafe equivalence in input
CWE: CWE-1289 / CWE-20
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: weitongli.com
Status: Confirmed

CVE: CVE-2026-101015 (🔒)
GCVE (CVE): GCVE-0-2026-101015
GCVE (VulDB): GCVE-100-410885
scip Labs: https://www.scip.ch/en/?labs.20161013

Entryinfo

Created: 09/27/2026 13:38
Changes: 09/27/2026 13:38 (56)
Complete: 🔍
Submitter: WeitongLi
Cache ID: 216::103

Submitinfo

Accepted

  • Submit #917216: The Trusted Domain Project OpenDMARC 1.4.2 Improper Authentication (by WeitongLi)

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