What is CVE-2026-18568?

CVE-2026-18568 is a high-severity vulnerability in Timlegge Xml::sig, classified under Improper Verification of Cryptographic Signature. CVSS score: 7.5/10. Published 2026-08-03.

How severe is CVE-2026-18568?

High severity. CVSS v3 base score is 7.5 out of 10.

Vulnerability in Timlegge Xml::sig

CVE-2026-18568

XML::Sig versions from 0.29 before 0.72 for Perl allow signature verification bypass because verify returns true when every signature was skipped before any cryptographic check. verify in lib/XML/Sig.pm counts the `//dsig:Signature` eleme…

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N.

Affected products

Timlegge Xml::sig — versions 0.29

Weakness classification (CWE)

CWE-347 — Improper Verification of Cryptographic Signature

References

9b29abf9-4ab0-4765-b253-1875cd9b441e (patch)
9b29abf9-4ab0-4765-b253-1875cd9b441e (release-notes)
9b29abf9-4ab0-4765-b253-1875cd9b441e (related)

Frequently asked questions

What is CVE-2026-18568?: CVE-2026-18568 is a high-severity vulnerability in Timlegge Xml::sig, classified under Improper Verification of Cryptographic Signature. CVSS score: 7.5/10. Published 2026-08-03.
How severe is CVE-2026-18568?: High severity. CVSS v3 base score is 7.5 out of 10.