CVE-2026-49283

unknown

Published 2026-07-02 · Modified 2026-07-02

💬 Discuss on Community ✚ Propose mitigation

CVSS v3

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CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:N

CVSS v4 NEW

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not yet in upstream

VIR risk

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Description

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

Predictions

Exploit likelihood

30%

Patch ETA

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Heuristic predictions, AS-IS, for prioritization only.

Mitigations

No mitigations published for this CVE yet.

The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.

✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here with source_tier=community-verified.

Package impact

Ecosystem	Package	Vulnerable	Fixed
Packagist	simplesamlphp/saml2	`<4.20.2\|>=5.0.0,<5.0.6\|>=6.0.0,<6.2.1`
Packagist	simplesamlphp/saml2-legacy	`<4.20.2`	`4.20.2`
Packagist	simplesamlphp/saml2	`>=6.0.0,<6.2.1`	`6.2.1`
Packagist	simplesamlphp/saml2	`>=5.0.0,<5.0.6`	`5.0.6`
Packagist	simplesamlphp/saml2	`<4.20.2`	`4.20.2`

References

Community-verified mitigations for this CVE will appear above when contributors publish them.

Verify integrity in audit chain (admin only). AS-IS.