CVE-2026-2968
published 2026-02-23CVE-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…
PriorityP418low3.7CVSS 3.1
AVNACHPRNUINSUCNILAN
EPSS
0.22%
12.2th percentile
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.
Affected
22 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| cesanta | mongoose | <= 7.20 | — |
| cesanta | mongoose | — | — |
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CVSS provenance
nvdv3.13.7LOWCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N
nvdv4.02.9LOWCVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
nvdv2.02.6LOWAV:N/AC:H/Au:N/C:N/I:P/A:N
osv6.3MEDIUM
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OSV
CVE-2026-2968: A vulnerability was detected in Cesanta Mongoose up to 7
osv·2026-02-23·CVSS 6.3
CVE-2026-2968 [MEDIUM] CVE-2026-2968: A vulnerability was detected in Cesanta Mongoose up to 7
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.
GHSA
GHSA-jprc-mg35-68jq: A vulnerability was detected in Cesanta Mongoose up to 7
ghsa_unreviewed·2026-02-23
CVE-2026-2968 [MEDIUM] CWE-345 GHSA-jprc-mg35-68jq: A vulnerability was detected in Cesanta Mongoose up to 7
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.
No detection rules found.
No public exploits indexed.
Bugzilla
CVE-2026-2968 smplayer: Cesanta Mongoose: Improper cryptographic signature verification in Poly1305 Authentication Tag Handler [fedora-42]
bugzilla·2026-02-23·CVSS 2.9
CVE-2026-2968 [LOW] CVE-2026-2968 smplayer: Cesanta Mongoose: Improper cryptographic signature verification in Poly1305 Authentication Tag Handler [fedora-42]
CVE-2026-2968 smplayer: Cesanta Mongoose: Improper cryptographic signature verification in Poly1305 Authentication Tag Handler [fedora-42]
Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process.
Discussion:
This message is a reminder that Fedora Linux 42 is nearing its end of life.
Fedora will stop maintaining and issuing updates for Fedora Linux 42 on 2026-05-13.
It is Fedora's policy to close all bug reports from releases that are no longer
maintained. At that time this bug will be closed as EOL if it remains open with a
'version' of '42'.
Package Maintainer: If you wish for this bug to remain open because you
plan to
Bugzilla
CVE-2026-2968 mongoose: Cesanta Mongoose: Improper cryptographic signature verification in Poly1305 Authentication Tag Handler [fedora-42]
bugzilla·2026-02-23·CVSS 2.9
CVE-2026-2968 [LOW] CVE-2026-2968 mongoose: Cesanta Mongoose: Improper cryptographic signature verification in Poly1305 Authentication Tag Handler [fedora-42]
CVE-2026-2968 mongoose: Cesanta Mongoose: Improper cryptographic signature verification in Poly1305 Authentication Tag Handler [fedora-42]
Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process.
Discussion:
This message is a reminder that Fedora Linux 42 is nearing its end of life.
Fedora will stop maintaining and issuing updates for Fedora Linux 42 on 2026-05-13.
It is Fedora's policy to close all bug reports from releases that are no longer
maintained. At that time this bug will be closed as EOL if it remains open with a
'version' of '42'.
Package Maintainer: If you wish for this bug to remain open because you
plan to
Bugzilla
CVE-2026-2968 flmsg: Cesanta Mongoose: Improper cryptographic signature verification in Poly1305 Authentication Tag Handler [fedora-42]
bugzilla·2026-02-23·CVSS 2.9
CVE-2026-2968 [LOW] CVE-2026-2968 flmsg: Cesanta Mongoose: Improper cryptographic signature verification in Poly1305 Authentication Tag Handler [fedora-42]
CVE-2026-2968 flmsg: Cesanta Mongoose: Improper cryptographic signature verification in Poly1305 Authentication Tag Handler [fedora-42]
Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process.
Discussion:
This message is a reminder that Fedora Linux 42 is nearing its end of life.
Fedora will stop maintaining and issuing updates for Fedora Linux 42 on 2026-05-13.
It is Fedora's policy to close all bug reports from releases that are no longer
maintained. At that time this bug will be closed as EOL if it remains open with a
'version' of '42'.
Package Maintainer: If you wish for this bug to remain open because you
plan to fix
Wiz
CVE-2026-2968 Impact, Exploitability, and Mitigation Steps | Wiz
blogs_wiz·CVSS 6.3
CVE-2026-2968 [MEDIUM] CVE-2026-2968 Impact, Exploitability, and Mitigation Steps | Wiz
## CVE-2026-2968 :
NixOS vulnerability analysis and mitigation
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 : NVD
## 6.3
Score
Published February 23, 2026
Severity MEDIUM
CNA Score 6.3
Affected Technologies
NixOS
Homebrew
Has Public Exploit Yes
Has CISA KEV Exploit No
CISA KEV Releas
2026-02-23
Published