| Name | CVE-2026-2968 |
| 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. |
| Source | CVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
Vulnerable and fixed packages
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|
| mongoose (PTS) | forky, sid | 7.21+ds-2 | fixed |
| swupdate (PTS) | bullseye | 2020.11-2+deb11u1 | vulnerable |
| bookworm | 2022.12+dfsg-4+deb12u2 | vulnerable |
| trixie | 2024.12.1+dfsg-3+deb13u2 | vulnerable |
| forky | 2025.12+dfsg-8 | vulnerable |
| sid | 2025.12+dfsg-10 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|
| mongoose | source | (unstable) | (not affected) | | | |
| swupdate | source | (unstable) | 2025.12+dfsg-10 | | | |
Notes
- mongoose <not-affected> (Fixed before or with initial upload, also see bug #1135115)
[trixie] - swupdate <no-dsa> (Minor issue)
[bookworm] - swupdate <no-dsa> (Minor issue)
[bullseye] - swupdate <no-dsa> (Minor issue)