CVE-2026-97701
6.5 MEDIUMpublic exploit availablePublished 2026-11-04 · Updated 2026-11-04
AI analysis for this CVE has not been generated yet. Raw NVD data is shown below.
NVD description
Zulip is an open-source team collaboration tool. In Zulip Server versions through 12.1, the authenticated POST /messages/render endpoint renders the content parameter without enforcing the normal message length limit used by message send and edit operations. An authenticated user can submit Markdown up to the server body-size limit, causing disproportionate backend CPU consumption, and repeated or concurrent requests can degrade Markdown rendering performance or backend availability for other users. This issue is fixed in version 12.2.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Weaknesses
CWE-770
Public exploit & PoC references
- https://github.com/zulip/zulip/commit/31773c77c501391ede0fa8ec727f39508664e0ae
- https://github.com/zulip/zulip/commit/4d94dd2ee6337a4b3351694dd314a45d3fe11031
- https://github.com/zulip/zulip/pull/39913
- https://github.com/zulip/zulip/releases/tag/12.2
- https://github.com/zulip/zulip/security/advisories/GHSA-m257-w4r5-5rmf
All references
- https://github.com/zulip/zulip/commit/31773c77c501391ede0fa8ec727f39508664e0ae
- https://github.com/zulip/zulip/commit/4d94dd2ee6337a4b3351694dd314a45d3fe11031
- https://github.com/zulip/zulip/pull/39913
- https://github.com/zulip/zulip/releases/tag/12.2
- https://github.com/zulip/zulip/security/advisories/GHSA-m257-w4r5-5rmf
- https://zulip.readthedocs.io/en/latest/overview/changelog.html#zulip-server-12-2
Source data: NVD (nvd.nist.gov), public domain. Exploit-DB.ai adds local AI analysis for defensive use only.
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