CVE-2025-68121

· CRITICALModified

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CVSS v3.1

10.0

EPSS

0.77%

Published

Feb 5, 2026

Modified

Apr 29, 2026

Public PoC / Exploit

All weaponized →

No public PoC or exploit code indexed for this CVE.

Links to public security research (Exploit-DB, Nuclei, Trickest, GitHub) for defensive use only.

Description

During session resumption in crypto/tls, if the underlying Config has its ClientCAs or RootCAs fields mutated between the initial handshake and the resumed handshake, the resumed handshake may succeed when it should have failed. This may happen when a user calls Config.Clone and mutates the returned Config, or uses Config.GetConfigForClient. This can cause a client to resume a session with a server that it would not have resumed with during the initial handshake, or cause a server to resume a session with a client that it would not have resumed with during the initial handshake.

CVSS Vector

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

Weaknesses (CWE)

CWE-295

Affected Products (4)

golang · go (up to 1.24.13)vulnerable

golang · go (up to 1.25.7)vulnerable

golang · govulnerable

References (4)

https://go.dev/cl/737700

Patch

https://go.dev/issue/77217