CVE-2026-82208
Published:September 02, 2026
Updated:September 02, 2026
libcurl wolfSSL CA cache hit overrides callback: when CA caching is enabled and a CURLOPT_SSL_CTX_FUNCTION callback replaces the trust store, libcurl can silently reinstall the cached store after the callback returns, so certificates the callback rejected are accepted. wolfSSL backend only; does not affect the curl tool. Affects curl 8.9.1 through 8.21.0, fixed in 8.22.0.
Affected Packages
libcurl (CONAN):
Affected version(s) >=8.9.1 <8.22.0Fix Suggestion:
Update to version 8.22.0https://github.com/curl/curl.git (GITHUB):
Affected version(s) >=curl-8_9_1 <curl-8_22_0Fix Suggestion:
Update to version curl-8_22_0Related Resources (2)
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Contact UsCVSS v4
Base Score:
6.3
Attack Vector
NETWORK
Attack Complexity
HIGH
Attack Requirements
PRESENT
Privileges Required
NONE
User Interaction
NONE
Vulnerable System Confidentiality
LOW
Vulnerable System Integrity
LOW
Vulnerable System Availability
NONE
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
4.8
Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
LOW
Integrity
LOW
Availability
NONE
Weakness Type (CWE)
Improper Certificate Validation