CVE-2026-2968

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2026-2968
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.

3.7 /10

CVSS v3 : LOW

V3 Legend

Vector :

Exploitability : 2.2 / Impact : 1.4

Attack Vector NETWORK

Attack Complexity HIGH

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact LOW

Availability Impact NONE

Scope UNCHANGED

2.6 /10

CVSS v2.0 : LOW

V2 Legend

Vector : AV:N/AC:H/Au:N/C:N/I:P/A:N

Exploitability : 4.9 / Impact : 2.9

Access Vector NETWORK

Access Complexity HIGH

Authentication NONE

Confidentiality Impact NONE

Integrity Impact PARTIAL

Availability Impact NONE

References
Link Resource
https://github.com/dwBruijn/CVEs/blob/main/Mongoose/ChaCha20Poly1305.md Exploit Third Party Advisory
https://github.com/dwBruijn/CVEs/blob/main/Mongoose/ChaCha20Poly1305.md#poc Exploit Third Party Advisory
https://vuldb.com/?ctiid.347335 Permissions Required VDB Entry
https://vuldb.com/?id.347335 Third Party Advisory VDB Entry
https://vuldb.com/?submit.757091 Third Party Advisory VDB Entry
Configurations

Configuration 1 (hide)

cpe:2.3:a:cesanta:mongoose:*:*:*:*:*:*:*:*
History

23 Feb 2026, 20:17

Type Values Removed Values Added
First Time Cesanta mongoose
Cesanta
CPE cpe:2.3:a:cesanta:mongoose:*:*:*:*:*:*:*:*
References () https://github.com/dwBruijn/CVEs/blob/main/Mongoose/ChaCha20Poly1305.md - () https://github.com/dwBruijn/CVEs/blob/main/Mongoose/ChaCha20Poly1305.md - Exploit, Third Party Advisory
References () https://github.com/dwBruijn/CVEs/blob/main/Mongoose/ChaCha20Poly1305.md#poc - () https://github.com/dwBruijn/CVEs/blob/main/Mongoose/ChaCha20Poly1305.md#poc - Exploit, Third Party Advisory
References () https://vuldb.com/?ctiid.347335 - () https://vuldb.com/?ctiid.347335 - Permissions Required, VDB Entry
References () https://vuldb.com/?id.347335 - () https://vuldb.com/?id.347335 - Third Party Advisory, VDB Entry
References () https://vuldb.com/?submit.757091 - () https://vuldb.com/?submit.757091 - Third Party Advisory, VDB Entry

23 Feb 2026, 18:13

Type Values Removed Values Added
Summary
  • (es) Se detectó una vulnerabilidad en Cesanta Mongoose hasta 7.20 que afecta a la función mg_chacha20_poly1305_decrypt del archivo /src/tls_chacha20.c del componente Gestor de Etiquetas de Autenticación Poly1305. Si se manipula se puede lograr una verificación impropia de la firma criptográfica. El ataque puede lanzarse en remoto. Este ataque se caracteriza por una alta complejidad y es difícil de explotar. El exploit ahora es público y puede ser usado. El proveedor fue contactado con anterioridad sobre esta divulgación, pero no respondió de ninguna manera.

23 Feb 2026, 04:16

Type Values Removed Values Added
New CVE
Information

Published : 2026-02-23 04:16

Updated : 2026-02-23 20:17

NVD link : CVE-2026-2968

Mitre link : CVE-2026-2968

CVE.ORG link : CVE-2026-2968

JSON object : View

Products Affected

cesanta

  • mongoose
CWE
CWE-345

Insufficient Verification of Data Authenticity

CWE-347

Improper Verification of Cryptographic Signature