CVE-2026-58066 PUBLISHED

Assigner: hackerone
Reserved: 28.06.2026 Published: 30.07.2026 Updated: 31.07.2026

Rocket.Chat's SAML SSO before versions 8.7.0, 8.6.1, 8.5.2, 8.4.5, 8.3.7, 8.2.7, 8.1.7, 8.0.8, and 7.10.14 verified XML signatures but did not bind the validated signature to samlp:Response / saml:Assertion. An attacker could submit a wrapped document carrying forged identity attributes alongside any valid signature made by the trusted IdP certificate, and log in as an arbitrary user.

Metrics

CVSS Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS Score: 9.8

Product Status

Vendor Rocket.Chat
Product Rocket.Chat
Versions Default: unaffected
  • affected from 0 to 8.7.0 (excl.)
  • affected from 0 to 8.6.1 (excl.)
  • affected from 0 to 8.5.2 (excl.)
  • affected from 0 to 8.4.5 (excl.)
  • affected from 0 to 8.3.7 (excl.)
  • affected from 0 to 8.2.7 (excl.)
  • affected from 0 to 8.1.7 (excl.)
  • affected from 0 to 8.0.8 (excl.)
  • affected from 0 to 7.10.14 (excl.)

Credits

  • jayden (0jayden) finder

References

Problem Types

  • CWE-287 Improper Authentication - Generic CWE