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SimpleSAMLphp HTTP-Artifact TLS validator confusion allows cross-IdP authentication bypass

🗓️ 02 Jul 2026 20:25:56Reported by GitHub Advisory DatabaseType 
github
 github
🔗 github.com👁 41 Views

SimpleSAMLphp HTTP-Artifact flow permits cross identity provider authentication bypass due to TLS validator misuse.

Related
Detection
Refs
ReporterTitlePublishedViews
Family
cve
CVE
CVE-2026-49283
19 Aug 202614:47
cve
cvelist
Cvelist
CVE-2026-49283 SimpleSAMLphp HTTP-Artifact TLS validator confusion allows cross-IdP authentication bypass
19 Aug 202614:47
cvelist
debiancve
Debian CVE
CVE-2026-49283
19 Aug 202614:47
debiancve
euvd
EUVD
EUVD-2026-62502
19 Aug 202614:47
euvd
nvd
NVD
CVE-2026-49283
19 Aug 202615:17
nvd
osv
OSV
DEBIAN-CVE-2026-49283
19 Aug 202615:17
osv
osv
OSV
GHSA-6929-8P9F-26JX SimpleSAMLphp HTTP-Artifact TLS validator confusion allows cross-IdP authentication bypass
2 Jul 202620:25
osv
osv
OSV
UBUNTU-CVE-2026-49283
19 Aug 202615:17
osv
ptsecurity
Positive Technologies
PT-2026-55452
2 Jul 202600:00
ptsecurity
snyk
Snyk
Improper Certificate Validation
2 Jul 202620:25
snyk
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Vulners
Node
OR
simplesamlphpsaml2-legacyRange<4.19.3composer
simplesamlphpsaml2Range<4.19.3composer
simplesamlphpsaml2-legacyRange4.20.04.20.2composer
simplesamlphpsaml2Range4.20.04.20.2composer
simplesamlphpsaml2Range5.0.05.0.6composer
simplesamlphpsaml2Range6.0.06.2.1composer

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04 Aug 2026 21:25Current
5.9Medium risk
Vulners AI Score5.9
CVSS 3.18.7
EPSS0.00344
SSVC
41