CVE-2026-2967

A security vulnerability has been detected in Cesanta Mongoose up to 7.20. This affects the function getpeer of the file /src/net_builtin.c of the component TCP Sequence Number Handler. The manipulation leads to improper verification of source of a communication channel. The attack may be initiated remotely. The attack's complexity is rated as high. The exploitability is reported as difficult. The exploit has been disclosed publicly and may be used. The vendor was contacted early about this disclosure but did not respond in any way.

• CWE-940

• https://github.com/dwBruijn/CVEs/blob/main/Mongoose/tcp_rst.mdExploit, Third Party Advisory
• https://github.com/dwBruijn/CVEs/blob/main/Mongoose/tcp_rst.md#pocExploit, Third Party Advisory
• https://vuldb.com/?ctiid.347334Permissions Required, VDB Entry
• https://vuldb.com/?id.347334Third Party Advisory, VDB Entry
• https://vuldb.com/?submit.755450Third Party Advisory, VDB Entry

Published

Feb 23, 2026

Last Modified

Jun 17, 2026

Status

Analyzed

• 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-2026-29646In OpenXiangShan NEMU prior to 55295c4, when running with RV…9.8
• CVE-2026-29647In OpenXiangShan NEMU, insufficient Smstateen permission enf…6.5
• CVE-2026-29648In OpenXiangShan NEMU, when Smstateen is enabled, clearing m…8.8
• CVE-2026-29649NEMU contains an implementation flaw in its RISC-V Hyperviso…9.8
• CVE-2026-2965A security flaw has been discovered in 07FLYCMS, 07FLY-CMS a…2.4
• CVE-2026-2966A weakness has been identified in Cesanta Mongoose up to 7.2…3.7
• CVE-2026-2968A vulnerability was detected in Cesanta Mongoose up to 7.20.…3.7
• CVE-2026-2969A flaw has been found in datapizza-labs datapizza-ai 0.0.2. …7.2
• CVE-2026-2970A vulnerability has been found in datapizza-labs datapizza-a…7.5
• CVE-2026-2971A vulnerability was found in a466350665 Smart-SSO up to 2.1.…6.1
• CVE-2026-2972A vulnerability was determined in a466350665 Smart-SSO up to…5.4
• CVE-2026-2973GitLab has remediated an issue in GitLab CE/EE affecting all…5.4