CVE-2026-40300 (GCVE-0-2026-40300)

Vulnerability from cvelistv5 – Published: 2026-05-12 16:33 – Updated: 2026-05-13 12:44
VLAI
Title
Zulip: Message edit history visible in "moves only" policy through /api/v1/messages/{id}/history
Summary
Zulip is an open-source team collaboration tool. Prior to 12.0, With message_edit_history_visibility_policy set to "moves", /api/v1/messages/{id}/history still returns historical content values, allowing low-privilege users to recover text that was edited away from other users' messages. This vulnerability is fixed in 12.0.
Severity
6 (Medium)
CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-05-13 12:44 UTC
CWE
  • CWE-284 - Improper Access Control
Assigner
References
Impacted products
Vendor Product Version CPE status
zulip zulip Affected: < 12.0
guessed Create a notification for this product.
Show details on NVD website
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