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AWS-LC vulnerabilities

4 published CVES affecting AWS-LC, from public sources (CVE.org, NVD, CISA KEV, FIRST EPSS, OSV).

Total
4
Critical
1
High
3
Medium
0
Low
0
Unscored
0
CISA KEV
0

Latest AWS-LC CVEs

Newest publication first

  1. CVE-2026-4428 CRL Distribution Point Scope Check Logic Error in AWS-LC

    Published
    CriticalCVSS 9.1 EPSS 0.28%

    A logic error in CRL distribution point validation in AWS-LC before 1.71.0 causes partitioned CRLs to be incorrectly rejected as out of scope, which allows a revoked certificate to bypass certificate revocation checks. To remediate this issue, users should upgrade to AWS-LC 1.71....

  2. CVE-2026-3338 PKCS7_verify Signature Validation Bypass in AWS-LC

    Published
    HighCVSS 8.7 EPSS 0.78%

    Improper signature validation in PKCS7_verify() in AWS-LC allows an unauthenticated user to bypass signature verification when processing PKCS7 objects with Authenticated Attributes. Customers of AWS services do not need to take action. Applications using AWS-LC should upgrade to...

  3. CVE-2026-3337 Timing Side-Channel in AES-CCM Tag Verification in AWS-LC

    Published
    HighCVSS 8.2 EPSS 1.1%

    Observable timing discrepancy in AES-CCM decryption in AWS-LC allows an unauthenticated user to potentially determine authentication tag validity via timing analysis. The impacted implementations are through the EVP CIPHER API: EVP_aes_128_ccm, EVP_aes_192_ccm, and EVP_aes_256_cc...

  4. CVE-2026-3336 PKCS7_verify Certificate Chain Validation Bypass in AWS-LC

    Published
    HighCVSS 8.7 EPSS 0.74%

    Improper certificate validation in PKCS7_verify() in AWS-LC allows an unauthenticated user to bypass certificate chain verification when processing PKCS7 objects with multiple signers, except the final signer. Customers of AWS services do not need to take action. Applications usi...

Sources: CVE.org, NVD, CISA KEV, FIRST EPSS, OSV and public exploit-reference metadata. Product matching comes from the published CVE records. A proof-of-concept means public code exists; it is not evidence of exploitation.