CVE-2026-2968

low

Published 2026-02-23 · Modified 2026-04-29

CVSS v3

3.7

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N

CVSS v2

2.6

VIR risk

3.7

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.

Predictions

Exploit likelihood

47%

Patch ETA

—

Heuristic predictions, AS-IS, for prioritization only.

Mitigations

vendor Authored 2026-05-27

Vendor advisory: debian — https://security-tracker.debian.org/tracker/CVE-2026-2968

OS impact

OS	Version	Status	Fixed in
debian	forky	fixed	`0`
debian	sid	fixed	`0`
debian	bookworm	affected
debian	bullseye	affected
debian	trixie	affected

Application impact

Vendor	Product	Versions	Fixed
cesanta	mongoose	`{"endIncluding":"7.20"}`

References

CWEs

CWE-345 CWE-347

Verify integrity in audit chain (admin only). AS-IS.