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CVE-2026-9487 (GCVE-0-2026-9487)

Vulnerability from cvelistv5 – Published: 2026-08-03 13:14 – Updated: 2026-08-03 19:59
VLAI
Title
XML::Sig versions before 0.71 for Perl allow signature wrapping via duplicate ID
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.
SSVC
Exploitation: none Automatable: yes Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-03 19:59 UTC
CWE
  • CWE-347 - Improper Verification of Cryptographic Signature
Impacted products
Vendor Product Version CPE status
TIMLEGGE XML::Sig Affected: 0 , < 0.71 (custom)
guessed Create a notification for this product.
Show details on NVD website

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