# CVE-2026-79772: ruby-nokogiri: Nokogiri versions before 1.19.1 fail to check the return value from xmlC14NExecute in the canonicalize method, return...

CVE-2026-79772 is fixed in ruby-nokogiri on 1 platform by DEBIAN-CVE-2026-79772 (version 1.19.1+dfsg-1), released August 27, 2026. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2026-79772
- Priority: Routine
- CVSS: n/a
- EPSS: 0.0034
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Aug 25, 2026

## Description

Nokogiri versions before 1.19.1 fail to check the return value from xmlC14NExecute in the canonicalize method, returning an empty string on failure instead of raising an exception. Attackers can exploit this to bypass signature validation in downstream SAML libraries by providing invalid canonicalized XML that is incorrectly accepted as valid.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | ruby-nokogiri Debian 14 | 1.19.1+dfsg-1 | [DEBIAN-CVE-2026-79772](https://patchblox.com/security/data/fix/linux/debian-cve-2026-79772.md) | Aug 27, 2026 |

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Data as of 2026-11-08T06:59:42Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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