CVE-2026-40300
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Prior to 12.0, With message_edit_history_visibility_policy set to "moves", /api/v1/messages/{id}/history still returns historical content values, allowing low-privilege users to recover text that was edited away from other users' messages.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.
- Affected products
- Zulip
- Zulip Zulip Server
- = 10.0
- Fix
- Available
- CVSS 3.1
- 6.5 MEDIUM
- EPSS
- 0.2% (16th percentile)
- Weakness
- CWE-284
- NVD status
- Analyzed
- Published
- 2026-05-12
CVE-2026-40300 at NVD
No indexed exploits for CVE-2026-40300 yet
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No exploit for CVE-2026-40300 has been indexed yet. Our index is built from live traffic and upstream syncs, so this page can only say what it knows — not that no exploit exists.