Reference page — cumulative record through Sunday, October 4, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.

CVE-2026-82208

CVE-2026-82208HIGH

curl curl — wolfSSL CA-cache hit overrides callback

  AV  AC  PR  UI  S  C  I  A   CVSS    EPSS   %ile   KEV
   N   L   N   N  U  H  N  N    7.5   .0041   32.7     —

AFFECTED
  Product  Versions                                    Fixed
  curl     8.9.1 –                                     —
  curl     0f2876b2c33f6784a27b6f7345bd8cd95b46352a –  —
  curl     8.21.0 –                                    —

TIMELINE
  Aug 28  Reserved by curl
  Sep 6   Published (CNA: curl)
  Sep 11  EXPLOIT PUBLISHED — CVE-2026-82208 (curl). Public exploit reference added.
  Sep 15  EXPLOIT PUBLISHED — CVE-2026-82208 (curl). Public exploit reference added.

CWE-295 · CNA: curl · CVSS v3.1 · 3 references · NVD status: Modified

Description

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.

Lifecycle

Complete event history — 4 events, chronological
Date	Event	Detail
August 28, 2026	Reserved	Reserved by curl
September 6, 2026	Published	Published (CNA: curl)
September 11, 2026	EXPLOIT PUBLISHED	EXPLOIT PUBLISHED — CVE-2026-82208 (curl). Public exploit reference added.
September 15, 2026	EXPLOIT PUBLISHED	EXPLOIT PUBLISHED — CVE-2026-82208 (curl). Public exploit reference added.

Affected

Affected products and packages — 3 rows
Vendor	Product / Package	Ecosystem	Version introduced	Fixed
curl	curl	—	8.9.1	—
curl	curl	—	0f2876b2c33f6784a27b6f7345bd8cd95b46352a	—
curl	curl	—	8.21.0	—

Weaknesses

CWE-295

References (3)

https://curl.se/docs/CVE-2026-82208.html [Patch, Vendor Advisory]
https://curl.se/docs/CVE-2026-82208.json [Vendor Advisory]
https://hackerone.com/reports/3973090 [Exploit, Mitigation, Third Party Advisory]

Authoritative record: CVE-2026-82208 at cve.org

Vendors: curl

Weaknesses: CWE-295

About this page

This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2026-82208 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Sunday, October 4, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.