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TI-2026-08334 Aliases CVE-2026-9487GHSA-wqp7-2ww4-q6mf

Improper signature verification in TIMLEGGE XML::Sig

Priority MEDIUM 47CWE-347Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Security bypass
Confidentiality · integrity · availability
High · High · None
Fix status
Fixed

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA. Impact type from CWE-347.

Summary

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 returns the first node of the resulting node set. A document in which two elements share that ID value is accepted: the digest and signature are checked against whichever element comes first in document order, and the duplicate is not detected. Such a document verifies successfully while an application that resolves the same ID independently can read the second, attacker supplied element; in a SAML2 context this places the contents of an Assertion under attacker control.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00276 20th percentileScored 2026-11-07
Fix Fixed XML::Sig (TIMLEGGE): 0.71

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
TIMLEGGEXML::Sigbefore 0.710.71Patch availableCNA
  • XML::Sig VendorTIMLEGGE Affected before 0.71 Fixed in 0.71 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:xml\:\:sig_project:xml\:\:sig:*:*:*:*:*:perl:*:*sig_project xml\VulnerableXml
  • cpe:2.3:a:xml\:\:sig_project:xml\:\:sig:*:*:*:*:*:perl:*:* Versions sig_project xml\ Vulnerable ·Xml

Remediation

  • Fix · CNA XML::Sig (TIMLEGGE) Fixed in 0.71

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Release ·

    TIMLEGGE XML::Sig 0.71

    2 records Highest priority Priority MEDIUM 2 MEDIUM

    Other records, highest priority first

    • TI-2026-08239 XML::Sig versions before 0.71 for Perl allow XPath injection in ID lookupPriority MEDIUM 48
    Show all 2 records →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-9487
  2. 2026-10-03 Alias added: GHSA-wqp7-2ww4-q6mf

References

Patch 1

Other 1

  • TI-2026-23735 Integer overflow in TIMLEGGE Crypt::NaCl::Sodium CVSS 3.1CRITICAL 9.8
  • TI-2020-18981 IO::Compress::Brotli versions prior to 0.007 for Perl have an integer overflow in the bundled Brotli C library CVSS 3.1CRITICAL 9.8
  • TI-2026-14905 Improper signature verification in TIMLEGGE Net::SAML2 CVSS 3.1CRITICAL 9.8
  • TI-2026-08239 XML::Sig versions before 0.71 for Perl allow XPath injection in ID lookup CVSS 3.1CRITICAL 9.1
  • TI-2026-10497 Crypt::DSA versions before 1.21 for Perl reused the nonce across signatures, leading to… CVSS 3.1CRITICAL 9.1
  • TI-2026-02211 Integer overflow in TIMLEGGE Crypt::NaCl::Sodium CVSS 3.1CRITICAL 9.1
See all 14 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences