CVE-2026-100895 Details
Description
A security flaw has been discovered in Trusted Domain Project OpenARC up to 1.0.0.Beta1. Impacted is the function arc_parse_canon_t in the library libopenarc/arc-canon.c of the component libopenarc. The manipulation results in null pointer dereference. The attack may be launched remotely. The exploit has been released to the public and may be used for attacks. Upgrading to version 1.0.0.Beta0 is recommended to address this issue. Upgrading the affected component is advised.
A NULL pointer dereference vulnerability has been identified in Trusted Domain Project OpenARC versions prior to 1.0.0.Beta1. The issue arises in the libopenarc component, specifically within the arc_parse_canon_t function in the arc-canon.c file. This vulnerability can be exploited remotely, leading to a denial-of-service condition by crashing the ARC verifier. The issue occurs when an ARC-Message-Signature is processed with a 'c=relaxed' tag that omits the required body canonicalisation, a scenario that can arise with legitimate forwarded emails.
Users are advised to upgrade to OpenARC version 1.0.0.Beta0, where this vulnerability has been addressed.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed Sep 28, 2026CISA-ADP
Assessed Sep 28, 2026References to Advisories, Solutions, and Tools
By selecting these links, you will be leaving this site. These are references gathered from the official CVE record and are not endorsed by Volerion.
| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/trusteddomainproject/OpenARC/releases/tag/v1.0.0.Beta0 | [email protected] | Release NotesVendor |
| https://vuldb.com/cve/CVE-2026-100895 | [email protected] | AdvisoryPermission Required |
| https://vuldb.com/submit/917187 | [email protected] | Issue TrackingPermission Required |
| https://vuldb.com/vuln/410845 | [email protected] | BundlePermission Required |
| https://vuldb.com/vuln/410845/cti | [email protected] | Content Wall |
| https://weitongli.com/share/openarc-c-tag-null-deref.html | [email protected] | ExploitRemedyTechnical Analysis |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-404 | Improper Resource Shutdown or Release | [email protected] |
| CWE-476 | NULL Pointer Dereference | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| Trusted Domain Project OpenARC | <= 1.0.0.Beta1 |
CPE
Remediation
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Change History
2 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Sep 28, 2026 | CVE Modified | CISA-ADP |
| Sep 28, 2026 | New CVE Received | [email protected] |