CVE-2026-82208

wolfSSL CA-cache hit overrides callback

CVE-2026-82208 is fixed in curl on 1 platform by DEBIAN-CVE-2026-82208 (version 8.22.0-1), released September 19, 2026. It is not reported as exploited. Patch Radar priority: High.

High

CVSS

7.5

Important

Exploitation

None reported

No vendor assessment

CISA KEV

Not listed

Not in the Known Exploited Vulnerabilities catalog

EPSS

0.0041

35th percentile

With the wolfSSL backend, when CA caching is enabled and an `CURLOPT_SSL_CTX_FUNCTION` callback replaces the trust store, libcurl can silently reinstall the cached store after the callback returns. A certificate trusted by the cached store but rejected by the callback-selected store is then incorrectly accepted.

Where it's fixed

Product	Fixed in	Fix	Released
Linux
curl · Debian 14	8.22.0-1	DEBIAN-CVE-2026-82208	Sep 19, 2026

Details

Published
September 6, 2026
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Vendor advisory
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-82208

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