What is CVE-2026-9487?

CVE-2026-9487 is a critical-severity vulnerability in Timlegge Xml::sig, classified under Improper Verification of Cryptographic Signature. CVSS score: 9.1/10. Published 2026-08-03.

How severe is CVE-2026-9487?

Critical severity. CVSS v3 base score is 9.1 out of 10.

Vulnerability in Timlegge Xml::sig

CVE-2026-9487

XML::Sig versions before 0.71 for Perl allow signature wrapping via duplicate ID. _get_signed_xml() in lib/XML/Sig.pm, called from verify(), resolves the SignedInfo Reference/@URI to a node with the XPath expression "//*[@ID='$id']" and r…

CVSS v3 metric

CVSS v3 base score 9.1 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N.

Affected products

Timlegge Xml::sig — versions 0

Weakness classification (CWE)

CWE-347 — Improper Verification of Cryptographic Signature

References

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

Frequently asked questions

What is CVE-2026-9487?: CVE-2026-9487 is a critical-severity vulnerability in Timlegge Xml::sig, classified under Improper Verification of Cryptographic Signature. CVSS score: 9.1/10. Published 2026-08-03.
How severe is CVE-2026-9487?: Critical severity. CVSS v3 base score is 9.1 out of 10.