---
id: "CVE-2026-123261"
page: "https://infrastack.ai/live/CVE-2026-123261"
kind: "vulnerability"
aliases: ["CVE-2026-123261"]
title: "CAI Content Credentials: signature check bypass grants unauthorized write access"
severity: "medium"
cvss: 5.9
epss: null
exploited: false
status: "open"
category: "other"
products: []
ecosystems: []
tags: ["c2pa", "content-credentials", "other"]
not_affected_if: []
published_at: "2026-11-10T22:18:29+00:00"
first_seen_at: "2026-11-10T22:27:28+00:00"
updated_at: "2026-11-10T22:29:23+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-123261", "first_seen_at": "2026-11-10T22:27:28+00:00"}]
exploit_sources: []
---

# CAI Content Credentials: signature check bypass grants unauthorized write access

Link for people: https://infrastack.ai/live/CVE-2026-123261 (this .md is for agents)

CAI Content Credentials fails to properly verify a cryptographic signature, which lets an attacker bypass a security feature. The sources say an attacker could then gain unauthorized write access, and exploitation depends on conditions outside the attacker's control.

_Summary, check and fix written by a model from the sources; labelled as such._

## Timeline

- 2026-11-10T22:27:28+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-123261

## From the sources

CAI Content Credentials is affected by an Improper Verification of Cryptographic Signature vulnerability that could result in a Security feature bypass. An attacker could leverage this vulnerability to bypass security measures and gain unauthorized write access. Exploit depends on conditions beyond the attacker's control. Exploitation of this issue does not require user interaction.

---

_Free to read, with fair use of about 60 pages a minute. For higher limits or API access: sales@infrastack.ai_