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.

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact High

Integrity Impact None

Availability Impact None

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

The EPSS score is 0.00425.

Exploitation poc

Automatable yes

Technical Impact partial

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
curl curl unaffected
Version Status Constraints
8.9.1 affected < 8.14.2
8.15.0 affected < 8.16.1
8.17.0 affected < 8.20.1
8.21.0 affected < 8.22.0
curl curl unaffected
Version Status Constraints
0f2876b2c33f6784a27b6f7345bd8cd95b46352a affected < ed0338befd1d865a8ea1fbaa90013a096dedd07a
curl curl unaffected
Version Status Constraints
8.21.0 affected —
8.20.0 affected —
8.19.0 affected —
8.18.0 affected —
8.17.0 affected —
8.16.0 affected —
8.15.0 affected —
8.14.1 affected —
8.14.0 affected —
8.13.0 affected —
8.12.1 affected —
8.12.0 affected —
8.11.1 affected —
8.11.0 affected —
8.10.1 affected —
8.10.0 affected —
8.9.1 affected —

Configuration 1 [-]

cpe:2.3:a:haxx:curl:*:*:*:*:*:*:*:*

No data.

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Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://curl.se/docs/CVE-2026-82208.html cve-icon cve-icon
https://curl.se/docs/CVE-2026-82208.json cve-icon cve-icon
https://hackerone.com/reports/3973090 cve-icon cve-icon
History

Fri, 11 Sep 2026 23:45:00 +0000

Type Values Removed Values Added
First Time appeared Haxx
Haxx curl
CPEs cpe:2.3:a:haxx:curl:*:*:*:*:*:*:*:*
Vendors & Products Haxx
Haxx curl

Thu, 10 Sep 2026 05:00:00 +0000

Type Values Removed Values Added
Weaknesses CWE-296

Tue, 08 Sep 2026 19:30:00 +0000

Type Values Removed Values Added
Weaknesses CWE-295
Metrics cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N'}

ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Sun, 06 Sep 2026 20:15:00 +0000

Type Values Removed Values Added
Weaknesses CWE-296

Sun, 06 Sep 2026 19:45:00 +0000

Type Values Removed Values Added
First Time appeared Curl
Curl curl
Vendors & Products Curl
Curl curl

Sun, 06 Sep 2026 18:00:00 +0000

Type Values Removed Values Added
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.
Title wolfSSL CA-cache hit overrides callback
References

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: curl

Published:

Updated: 2026-09-15T06:03:14.795Z

Reserved: 2026-08-28T08:25:31.400Z

Link: CVE-2026-82208

cve-icon Vulnrichment

Updated: 2026-09-08T18:44:00.853Z

cve-icon NVD

Status : Modified

Published: 2026-09-06T18:17:22.733

Modified: 2026-09-15T07:16:31.050

Link: CVE-2026-82208

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-09-10T07:15:18Z

Weaknesses