Vulnerability 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.
CVSS Score
LOW
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Cesanta | Mongoose | <= 7.20 |
Related Weaknesses (CWE)
References
- https://github.com/dwBruijn/CVEs/blob/main/Mongoose/ChaCha20Poly1305.mdExploitThird Party Advisory
- https://github.com/dwBruijn/CVEs/blob/main/Mongoose/ChaCha20Poly1305.md#pocExploitThird Party Advisory
- https://vuldb.com/?ctiid.347335Permissions RequiredVDB Entry
- https://vuldb.com/?id.347335Third Party AdvisoryVDB Entry
- https://vuldb.com/?submit.757091Third Party AdvisoryVDB Entry
FAQ
What is CVE-2026-2968?
CVE-2026-2968 is a vulnerability with a CVSS score of 3.7 (LOW). 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...
How severe is CVE-2026-2968?
CVE-2026-2968 has been rated LOW with a CVSS base score of 3.7/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-2968?
Check the references section above for vendor advisories and patch information. Affected products include: Cesanta Mongoose.