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  4. CVE 2026 4428 crl distribution point scope check logic error in
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Back to active CVEs
High · CVSS 7.4CVE-2026-4428GHSA-9F94-5G5W-GF6R

CRL Distribution Point Scope Check Logic Error in AWS-LCCVE-2026-4428

Answer in brief

CVE-2026-4428 records a High severity (CVSS 7.4) vulnerability in CRL Distribution Point Scope Check Logic Error in AWS-LC. The current sources do not mark it as known exploited. The current feed maps aws-lc-fips-sys (crates.io), aws-lc-sys (crates.io). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Mar 19, 2026Updated Nov 9, 2026Source checked Nov 9, 2026First seen by HOL Nov 9, 2026Material review Nov 9, 2026
Upstream Advisory

Key facts

Risk
High · CVSS 7.4
Exploitation
Not marked as known exploited
Affected software
2 mapped packages or products
Fix availability
Available

Why this deserves its current priority

CVSS is 7.4. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps aws-lc-fips-sys (crates.io), aws-lc-sys (crates.io). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
aws-lc-fips-syscrates.io>=0.13.0 <0.13.130.13.13
aws-lc-syscrates.io>=0.15.0 <0.39.00.39.0

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for aws-lc-fips-sys, aws-lc-sys.
  2. 2Review the reported fix. Update aws-lc-fips-sys to 0.13.13; aws-lc-sys to 0.39.0 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

  1. Published upstream

    Mar 19, 2026

    Evidence: source:osv:source_dates:source-dates:record

  2. Source modified

    Nov 9, 2026

    Evidence: source:osv:source_dates:source-dates:record

  3. First seen by HOL

    Nov 9, 2026

Sources and claim methodology

  • Source referenceaws.amazon.com
  • Source referencecrates.io
  • Source referencecrates.io
  • Source referencerustsec.org
  • Source referencerustsec.org
Upstream source description

A logic error in CRL distribution point matching in AWS-LC allows a revoked certificate to bypass revocation checks during certificate validation, when the application enables CRL checking and uses partitioned CRLs with Issuing Distribution Point (IDP) extensions. Customers of AWS services do not need to take action. `aws-lc-fips-sys` contains code from AWS-LC. Applications using `aws-lc-fips-sys` should upgrade to the most recent release of `aws-lc-fips-sys`. ## Workarounds Applications can workaround this issue if they do not enable CRL checking (`X509_V_FLAG_CRL_CHECK`). Applications using complete (non-partitioned) CRLs without IDP extensions are also not affected. Otherwise, there is no workaround and applications using `aws-lc-fips-sys` should upgrade to the most recent releases of `aws-lc-fips-sys`.

Quoted source text, attributed separately from HOL analysis.

Record context

Vulnerability class
Vulnerability
EPSS
Not reported
CWE IDs
Not reported
Source
OSV
Source checked
Nov 9, 2026
References
5 linked sources
Open source record