Content Credentials Rust SDK: Improper Certificate Validation
CVE-2026-100121 is a high-severity improper certificate validation vulnerability in Content Credentials Rust SDK from Adobe, with a CVSS 3.1 base score of 7.5 out of 10. It can be exploited remotely over the network by an unauthenticated attacker, without any action from a user. Affected Content Credentials Rust SDK versions: c2pa-v0.90.15 and earlier. The record does not name a fixed version, so check the vendor advisory. There is no confirmed exploitation so far. EPSS estimates a 0.29% chance of exploitation within 30 days, which is low compared with other CVEs.
High severity with no evidence of exploitation so far.
What to do
- Update C2pa to 0.91.1 or a later version.
- Update C2pa-web to 0.15.3 or a later version.
- Update C2patool to 0.28.1 or a later version.
- Read the advisory on adobe.com for workarounds and exact fixed builds.
- Until you can update, restrict network access to the affected service so it is not reachable from untrusted networks.
Affected products and versions
| Vendor | Product | Affected versions | Fixed in |
|---|---|---|---|
| Adobe | Content Credentials Rust SDK | c2pa-v0.90.15 and earlier | Not stated |
| Adobe | C2PA Tool | c2patool-v0.27.15 and earlier | Not stated |
| Adobe | Content Credentials JS SDK | @contentauth/[email protected] and earlier | Not stated |
| Adobe | C2pa | before 0.91.1 | 0.91.1 |
| Adobe | C2pa-web | before 0.15.3 | 0.15.3 |
| Adobe | C2patool | before 0.28.1 | 0.28.1 |
Version data comes from the organisation that assigned the CVE. Confirm against the vendor advisory before deciding you are unaffected.
How the severity score breaks down
- Attack vector
- NetworkCan be exploited remotely over a network, including the internet.
- Attack complexity
- LowNo special conditions are needed; the attack works reliably.
- Privileges required
- NoneNo account or login is needed.
- User interaction
- NoneNo action by a victim is required.
- Scope
- UnchangedImpact stays within the vulnerable component.
- Confidentiality
- NoneNo data is disclosed.
- Integrity
- HighData or code can be modified at will.
- Availability
- NoneAvailability is not affected.
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N. Scored by CNA (adobe.com).
Official description
CAI Content Credentials is affected by an Improper Certificate Validation vulnerability that could result in a Security feature bypass. An attacker could leverage this vulnerability to bypass security measures and gain unauthorized write access. Exploitation of this issue does not require user interaction.
Source: the CVE record as published by its numbering authority, via NVD and CVE.org.
The underlying weakness: Improper Certificate Validation
The product does not validate, or incorrectly validates, a certificate.
How developers prevent this class of flaw
- Certificates should be carefully managed and checked to assure that data are encrypted with the intended owner's public key.
- If certificate pinning is being used, ensure that all relevant properties of the certificate are fully validated before the certificate is pinned, including the hostname.
More Improper Certificate Validation vulnerabilities (CWE-295)
Timeline
- CVE record published.
- CISA published its SSVC assessment (exploitation: none, automatable: yes, technical impact: partial).
- Record last changed materially (score, affected products, status or references).
References
Other vulnerabilities in Content Credentials Rust SDK
- 8.6 High severity
- 7.5 High severity
- 7.5 High severity
- 7.5 High severity
- 7.5 High severity
- 7.5 High severity
Recent Improper Certificate Validation vulnerabilities
- 7.5 High severity
- 7.5 High severity
- 7.5 High severity
- 7.4 High severity
- 7.4 High severity
- 7.4 High severity
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