CVE-2026-2968A vulnerability was detected in Cesanta Mongoose up to 7.20.
Updated under an hour ago ()
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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.
- CVSS
- 3.7 LOW (v3.1, NVD)CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N
- Weakness (CWE)
- CWE-345, CWE-347
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Not given
- NVD analysis
- Analyzed
- Record last updated
- Jun 17, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
cesanta mongoose cesanta:mongoose | through 7.20 | NVD |
References
- https://github.com/dwBruijn/CVEs/blob/main/Mongoose/ChaCha20Poly1305.mdexploit, third-party-advisory
- https://github.com/dwBruijn/CVEs/blob/main/Mongoose/ChaCha20Poly1305.md#pocexploit, third-party-advisory
- https://vuldb.com/?ctiid.347335permissions-required, vdb-entry
- https://vuldb.com/?id.347335third-party-advisory, vdb-entry
- https://vuldb.com/?submit.757091third-party-advisory, vdb-entry
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.