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CVE-2026-18089

Net::SAML2 versions before 0.86 for Perl allow SAML authentication bypass by verifying responses against the response-embedded certificate in verify_xml when no trust anchor is configured. verify_xml in Net::SAML2::Role::VerifyXML runs "return if !$anchors && !$cacert;" as soon as the XML::Sig check succeeds, and that check uses the X.509 certificate taken from the response's own dsig:KeyInfo/dsig:X509Certificate element, so an unanchored response is checked only against the key it carries. Bin
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:e0b1d285af60045887a69b69b290c51554573e484e736ce3c453a5b33fa8db67
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
1

Preserved source conflicts

No provider value was silently selected as the winner.

cwe · 2 assertions

{"cweId":"CWE-347","description":"CWE-347 Improper Verification of Cryptographic Signature","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:0e3b90e26c1a7ad4366b8a3b5f6d5b4595e52bb2cac48d5d0fe8ed777df4e83b · sha256:e6471af9a300706e… · /containers/cna/problemTypes/0/descriptions/0

{"cweId":"CWE-295","description":"CWE-295 Improper Certificate Validation","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:0e3b90e26c1a7ad4366b8a3b5f6d5b4595e52bb2cac48d5d0fe8ed777df4e83b · sha256:e6471af9a300706e… · /containers/cna/problemTypes/1/descriptions/0

Affected products and versions

1 source assertion
{"collectionURL":"https://cpan.org/modules","defaultStatus":"unaffected","packageName":"Net-SAML2","product":"Net::SAML2","programFiles":["lib/Net/SAML2/Role/VerifyXML.pm","lib/Net/SAML2/Binding/POST.pm","lib/Net/SAML2/Protocol/Assertion.pm"],"programRoutines":[{"name":"Net::SAML2::Role::VerifyXML::verify_xml"},{"name":"Net::SAML2::Binding::POST::handle_response"},{"name":"Net::SAML2::Protocol::Assertion::_verify_encrypted_assertion"}],"repo":"https://github.com/perl-net-saml2/perl-Net-SAML2","vendor":"TIMLEGGE","versions":[{"lessThan":"0.86","status":"affected","version":"0","versionType":"cu…
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:0e3b90e26c1a7ad4366b8a3b5f6d5b4595e52bb2cac48d5d0fe8ed777df4e83b · sha256:e6471af9a300706e… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":7.5,"baseSeverity":"HIGH","confidentialityImpact":"NONE","integrityImpact":"HIGH","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:0e3b90e26c1a7ad4366b8a3b5f6d5b4595e52bb2cac48d5d0fe8ed777df4e83b · sha256:e6471af9a300706e… · /containers/adp/0/metrics/0/cvssV3_1

CWE assertions

2 source assertions
{"cweId":"CWE-347","description":"CWE-347 Improper Verification of Cryptographic Signature","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:0e3b90e26c1a7ad4366b8a3b5f6d5b4595e52bb2cac48d5d0fe8ed777df4e83b · sha256:e6471af9a300706e… · /containers/cna/problemTypes/0/descriptions/0
{"cweId":"CWE-295","description":"CWE-295 Improper Certificate Validation","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:0e3b90e26c1a7ad4366b8a3b5f6d5b4595e52bb2cac48d5d0fe8ed777df4e83b · sha256:e6471af9a300706e… · /containers/cna/problemTypes/1/descriptions/0

Source references

4 source assertions
{"url":"https://metacpan.org/release/TIMLEGGE/Net-SAML2-0.85/source/lib/Net/SAML2/Binding/POST.pm#L21"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:0e3b90e26c1a7ad4366b8a3b5f6d5b4595e52bb2cac48d5d0fe8ed777df4e83b · sha256:e6471af9a300706e… · /containers/cna/references/2
{"url":"https://metacpan.org/release/TIMLEGGE/Net-SAML2-0.85/source/lib/Net/SAML2/Protocol/Assertion.pm#L84"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:0e3b90e26c1a7ad4366b8a3b5f6d5b4595e52bb2cac48d5d0fe8ed777df4e83b · sha256:e6471af9a300706e… · /containers/cna/references/3
{"url":"https://metacpan.org/release/TIMLEGGE/Net-SAML2-0.85/source/lib/Net/SAML2/Role/VerifyXML.pm#L32"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:0e3b90e26c1a7ad4366b8a3b5f6d5b4595e52bb2cac48d5d0fe8ed777df4e83b · sha256:e6471af9a300706e… · /containers/cna/references/1
{"tags":["release-notes"],"url":"https://metacpan.org/release/TIMLEGGE/Net-SAML2-0.88/source/Changes"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:0e3b90e26c1a7ad4366b8a3b5f6d5b4595e52bb2cac48d5d0fe8ed777df4e83b · sha256:e6471af9a300706e… · /containers/cna/references/0

Attribution and limitations

  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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