🛡️ CVE-2026-2968 — mongoose

🟢 CVSS 3.7 — Low ⚠️ Exploit Public CWE-345 NVD
3.7
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

A vulnerability was detected in Cesanta Mongoose up to 7.20. This impacts the function mg_chacha20_poly1305_decrypt of the file /src/tls_chacha20.c of the component Poly1305 Authentication Tag Handler. The manipulation results in improper verification of cryptographic signature. The attack may be launched remotely. This attack is characterized by high complexity. The exploitability is said to be difficult. The exploit is now public and may be used. The vendor was contacted early about this disclosure but did not respond in any way.

How this vulnerability can be exploited

This issue can be reached over the network, attack complexity is high, an attacker needs no privileges on the target. No user interaction is required. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality none, integrity low, availability none.

Weakness class

CVE-2026-2968 is classified as CWE-345: Insufficient Verification of Data Authenticity. Data is trusted without confirming it really came from the claimed source and was not altered.

Affected software

CVE-2026-2968 is recorded against 1 package.

  • mongoose (fixed in 7.20)

Timeline and source

Published on 23 February 2026 and last revised on 17 June 2026. A public exploit is known to exist, which raises the urgency of patching considerably. Record sourced from NVD.

References

github.com
github.com
vuldb.com
vuldb.com
vuldb.com

CVE-2026-2968 on other distributions

Each distribution ships its own build and its own fixed version. Pick the one you run:

Details

Severity LOW
CVSS Score 3.7
CVSS Vector CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N
CWE CWE-345
Public Exploit ⚠️ Yes
Source NVD
Published 2026-02-23
Updated 2026-08-11
Modified 2026-06-17
Fix URL N/A

Affected Packages

Software From version Fixed in
mongoose — 7.20

References

Permissions Required, VDB Entry https://vuldb.com/?ctiid.347335
Third Party Advisory, VDB Entry https://vuldb.com/?id.347335
Third Party Advisory, VDB Entry https://vuldb.com/?submit.757091

Exploit Protection

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CVE-2026-2968 carries CVSS 3.7 Low rating and a public exploit already exists. BotEraser checks your installation against this and other known CVE records, and blocks IPs associated with exploit activity.

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