CVE-2026-97701

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.

• CWE-770

• 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

Published

Nov 4, 2026

Last Modified

Nov 6, 2026

Status

Awaiting Analysis

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
• Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
• PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
• AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.

• CVE-2026-97688urllib3 is an HTTP client library for Python. From 2.6.2 unt…5.3
• CVE-2026-97689urllib3 is an HTTP client library for Python. From 1.10.3 un…7.5
• CVE-2026-9769justhtml through 1.9.1 (fixed in 1.10.0) is vulnerable to un…7.5
• CVE-2026-97691Convex is an open-source reactive database for application d…4.3
• CVE-2026-97693Yuxi is a large-model-based intelligent knowledge base and k…9.9
• CVE-2026-9770Kasa EC71 v4 and EC70 v4 firmware contains a static cryptogr…5.3
• CVE-2026-97702Open edX Platform enables the authoring and delivery of onli…5.3
• CVE-2026-97705Moleculer is a progressive microservices framework for Node.…7.5
• CVE-2026-9771The flash_copy() system call is verified by z_vrfy_flash_cop…8.8
• CVE-2026-97711Serialize JavaScript serializes JavaScript values to a super…2.3
• CVE-2026-97712Sonatype Nexus Repository 3 allows a user that holds the rol…8.7
• CVE-2026-97714CVE-2026-97714 is a is a vulnerability in the authentication…8.2