CVE-2026-2968
lowpriority · track · 0OT risk · elevatedEPSS 0.003 · 17 %ileEUUSEPSS · scored 2026-10-28
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
Technical severity, 0–10. One row per scoring source.
base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · low–medium · 1.7–6.3
ssvc
A stakeholder decision — act, attend, or track — from exploitation and impact.
weaknesses
The CWE weakness classes this flaw belongs to.
affected products (22)
Products and version ranges known to be affected.
also known as (3)
Other names and identifiers for this entity.
sources
Which sources assert this record, and when.
references (15)
External citations — patches, advisories, analysis.
- https://github.com/dwBruijn/CVEs/blob/main/Mongoose/ChaCha20Poly1305.mdcnnvd
- https://github.com/dwBruijn/CVEs/blob/main/Mongoose/ChaCha20Poly1305.md#poccnnvd
- https://vuldb.com/?ctiid.347335cnnvd
- https://vuldb.com/?id.347335cnnvd
- https://vuldb.com/?submit.757091cnnvd
- https://github.com/dwBruijn/CVEs/blob/main/Mongoose/ChaCha20Poly1305.mdenisa_euvd
- https://github.com/dwBruijn/CVEs/blob/main/Mongoose/ChaCha20Poly1305.md#pocenisa_euvd
- https://vuldb.com/?ctiid.347335enisa_euvd
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