CVE-2025-40934XML-Sig versions 0.27 through 0.67 for Perl incorrectly validates XML files if signatures are omitted.
Updated under an hour ago ()
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It affects xml::sig_project xml::sig. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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XML-Sig versions 0.27 through 0.67 for Perl incorrectly validates XML files if signatures are omitted. An attacker can remove the signature from the XML document to make it pass the verification check. XML-Sig is a Perl module to validate signatures on XML files. An unsigned XML file should return an error message. The affected versions return true when attempting to validate an XML file that contains no signatures.
- CVSS
- 9.3 CRITICAL (v3.1, NVD)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:H/A:N
- Weakness (CWE)
- CWE-347
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Not given
- NVD analysis
- Analyzed
- Record last updated
- Oct 18, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
xml::sig_project xml::sig xml::sig_project:xml::sig | from 0.27 through 0.67 | NVD |
References
- https://github.com/perl-net-saml2/perl-XML-Sig/issues/63issue-tracking, patch
- https://github.com/perl-net-saml2/perl-XML-Sig/pull/64issue-tracking
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.