CVE-2026-123610
rustls before 0.23.46 contains an uncontrolled memory allocation flaw in its optional Brotli certificate decompression, which limits decompressed output size but accepts an input-selected large history window. Malicious peers can send a certificate with a five-byte Brotli header requesting up to 1 GiB before authentication, aborting Brotli-enabled clients or client-authenticating servers whose allocator cannot satisfy the request.
Published:Nov 8, 2026
Last Modified:Nov 9, 2026
EPS:Nov 8, 2026
EPSS Score:0.00165
CVSS Score:3.7
Affected Products
Vendor
Product
Action
Vendor
Rustls
Product
Rustls
Rustls
Rustls
Vendor
Rustls Project
Product
Rustls
Rustls Project
Rustls
Exploits
No exploit reference
Common Weakness Enumeration
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Vulnerability Scoring System
Attack Vector
Network
Adjacent
Local
Physical
Privileges Required
None
Low
High
User Interaction
None
Required
Scope
Unchanged
Changed
Confidentiality
None
Low
High
Integrity
None
Low
High
Availability
None
Low
High
