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TI-2026-83446 Aliases CVE-2026-63400

Coop sessions stay valid after password reset

Priority LOW 12CWE-613Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Attack requirements
Present
Impact type
Security bypass
Confidentiality · integrity · availability
Low · None · None
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-613.

Summary

Coop from roostorg before 1.0.2 does not invalidate database-backed sessions when a password is reset. An attacker who has obtained a password and established a session keeps access after the legitimate user resets it, until the session reaches its 30-day maximum age. The weakness is classified as CWE-613 (insufficient session expiration).

Written with Claude Haiku 5.5 from the sources below · 2026-11-05

Description from the CNA

Coop is an open source review and moderation tool from ROOST. Prior to 1.0.2, `resetPasswordForToken` updates the password row without invalidating database-backed sessions. An attacker who has acquired a password and established a session retains access even after the legitimate user resets the password, leaving the compromised account under attacker control until the session expires at its `30-day` maximum age. This issue is fixed in version 1.0.2.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00269 19th percentileScored 2026-11-07
Fix Fixed coop (roostorg): 1.0.2

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
roostorgcoopbefore 1.0.21.0.2Patch availableCNA
  • coop Vendorroostorg Affected before 1.0.2 Fixed in 1.0.2 Patch available CNA

Remediation

Upgrade roostorg Coop to version 1.0.2, which is the fixed version.

Written with Claude Haiku 5.5 from the sources below · 2026-11-05

  • Fix · CNA coop (roostorg) Fixed in 1.0.2

Timeline

  1. 2026-10-30 Threatist record created from CVE-2026-63400
  2. 2026-11-06 CISA SSVC decision points changed

References

Other 4

  • TI-2026-83442 Unauthenticated organization creation in Coop GraphQL API CVSS 4.0MEDIUM 6.9
  • TI-2026-83441 Coop exposes organization and user data through unauthenticated GraphQL query CVSS 4.0HIGH 8.7
  • TI-2026-83445 Coop SAML login flaw allows cross-tenant account takeover CVSS 4.0HIGH 7.4
  • TI-2026-83443 Coop lets users alter other organizations' review queue access CVSS 4.0MEDIUM 5.3

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences