CVE-2026-123613
Published:November 08, 2026
Updated:November 09, 2026
Rustls from 0.23.13 before 0.23.45 accepts TLS 1.3 handshake messages at the wrong encryption level when they follow a key-changing message in the same record, because Deframer::aligned does not enforce RFC 8446 record-boundary alignment. A peer or on-path attacker can pack a plaintext EncryptedExtensions with the ServerHello, which rustls accepts unencrypted.
Affected Packages
https://github.com/rustls/rustls.git (GITHUB):
Affected version(s) =v/0.24.0-alpha.1 <v/0.24.0-dev.2Fix Suggestion:
Update to version v/0.24.0-dev.2https://github.com/rustls/rustls.git (GITHUB):
Affected version(s) >=v/0.23.13 <v/0.23.45Fix Suggestion:
Update to version v/0.23.45rustls (RUST):
Affected version(s) >=0.24.0-dev.0 <0.24.0-dev.2Fix Suggestion:
Update to version 0.24.0-dev.2rustls (RUST):
Affected version(s) >=0.23.13 <0.23.45Fix Suggestion:
Update to version 0.23.45Related Resources (12)
Do you need more information?
Contact UsCVSS v4
Base Score:
6.9
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
NONE
Vulnerable System Confidentiality
LOW
Vulnerable System Integrity
NONE
Vulnerable System Availability
NONE
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
5.3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
LOW
Integrity
NONE
Availability
NONE
Weakness Type (CWE)
Improper Input Validation
EPSS
Base Score:
0.16