CVE-2026-79772CWE-252

CVE-2026-79772

Medium · published August 25, 2026

CVSS v3.1
5.3
EPSS
0%
Percentile
26.4
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
5.3 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
CVSS v4.0
6.9 · CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N
EPSS
0.00342 · 26.4th percentile
Weakness
CWE-252 · Unchecked Return Value
Published
2026-08-25T20:17Z
Affected products (1)
ProductVersionsFixed in
nokogiri/nokogiri≥ 1.5.1, < 1.19.11.19.1
References (2)
https://github.com/sparklemotion/nokogiri/security/advisories/GHSA-wx95-c6cv-8532 · [email protected]https://www.vulncheck.com/advisories/nokogiri-before-unchecked-return-value-canonicalize · [email protected]
EPSS history
Timeline
  • 27 AUG 06:46Z
    EPSS moved — → 0%
    epss
  • 25 AUG 15:16Z
    Nokogiri before 1.19.1 Unchecked Return Value canonicalize
    cvelistv5