wolfSSL CRL critical extension bypass

F-WOLFSSL-CRL-SCOPE-COLLAPSE-001

Public snapshot: 7 Oct 2026. Status, releases and attribution belong to each source below; none is inferred from another record.

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Recorded evidence

1.0low

CVE-2026-6450CVEwolfSSL/wolfssl

wolfSSL CRL critical extension bypass

Fixed in: wolfSSL 5.9.2; affected 4.3.0 through 5.9.1

patched

details

Finding IDs: F-WOLFSSL-CRL-001 / F-WOLFSSL-CRL-SCOPE-COLLAPSE-001
CVE: CVE-2026-6450
Status: patched
Fixed in: wolfSSL 5.9.2; affected 4.3.0 through 5.9.1
Recorded credit: wolfSSL CNA finder credit: Oleh Konko (@1seal). Fix PR #10239 opened by @gasbytes; code authorship is not claimed.
Disclosure date: 25 Jun 2026
Note: The published CNA record references the same PR #10239 already recorded under F-WOLFSSL-CRL-001. F-WOLFSSL-CRL-SCOPE-COLLAPSE-001 is an alternate ID for that result, not a second independent defect. wolfSSL 5.9.2 release notes confirm the fix and reporter credit: https://github.com/wolfSSL/wolfssl/blob/v5.9.2-stable/ChangeLog.md. The LOW 1.0 assessment is the wolfSSL CNA assessment, separate from any original report assessment.
CVSS vector: CVSS:4.0/AV:A/AC:H/AT:P/PR:H/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N
CVE registry state: PUBLISHED
CVE state checked: 6 Oct 2026
CVSS assessment: wolfSSL CNA; v4.0; 1.0; observed 2026-10-07

F-WOLFSSL-CRL-001: Verification failures. Unknown critical CRL extensions are not rejected as required. Reviewed 24 Sep 2026. Mechanism assessed by 1seal.

Mechanism source for F-WOLFSSL-CRL-001

F-WOLFSSL-CRL-SCOPE-COLLAPSE-001: Verification failures. Unknown critical CRL extensions are not rejected as required. Reviewed 24 Sep 2026. Mechanism assessed by 1seal.

Mechanism source for F-WOLFSSL-CRL-SCOPE-COLLAPSE-001

Security area (1seal assessment): Identity. Unknown critical CRL extensions are not rejected as required. Reviewed 24 Sep 2026.

—score not recorded

wolfSSL/wolfssl #10239Security PRwolfSSL/wolfssl

reject crls with unrecognized critical extensions

Fixed in: wolfSSL 5.9.2

merged

details

Finding IDs: F-WOLFSSL-CRL-001 / F-WOLFSSL-CRL-SCOPE-COLLAPSE-001
CVE: CVE-2026-6450
Status: merged
Fixed in: wolfSSL 5.9.2
Recorded credit: wolfSSL CNA finder credit: Oleh Konko (@1seal). Fix PR #10239 opened by @gasbytes; code authorship is not claimed.
Reported date: 15 Apr 2026
Note: CVE-2026-6450 covers this existing CRL fix. The two Finding IDs identify the same result; CNA finder credit and PR authorship are separate. Published CNA CVSS 4.0: 1.0 LOW; no revision of the original report assessment.
Rationale: rejects CRLs with unrecognized critical extensions per RFC 5280 section 5.2 instead of silently accepting a revocation scope-bypass condition. public PR #10239 merged on 2026-04-21.
PR opened by: @gasbytes
PR state observed: closed; GitHub merged: true; 2026-09-24
PR observation basis: Public PR metadata recorded in the 2026-09-24 evidence audit; not a live status feed.
Contribution boundary: Report-associated upstream work; @1seal code authorship is not claimed. Credit, where recorded, is a separate fact.

F-WOLFSSL-CRL-001: Verification failures. Unknown critical CRL extensions are not rejected as required. Reviewed 24 Sep 2026. Mechanism assessed by 1seal.

Mechanism source for F-WOLFSSL-CRL-001

F-WOLFSSL-CRL-SCOPE-COLLAPSE-001: Verification failures. Unknown critical CRL extensions are not rejected as required. Reviewed 24 Sep 2026. Mechanism assessed by 1seal.

Mechanism source for F-WOLFSSL-CRL-SCOPE-COLLAPSE-001

Security area (1seal assessment): Identity. Unknown critical CRL extensions are not rejected as required. Reviewed 24 Sep 2026.

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