CVE-2026-3338Improper signature validation in PKCS7_verify() in AWS-LC allows an unauthenticated user to bypass signature verification when processing PKCS7 objects with Authenticated Attributes.
Updated under an hour ago ()
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It affects amazon aws-lc-sys and 1 other product. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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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 AWS-LC version 1.69.0.
- CVSS
- 7.5 HIGH (v3.1, NVD)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
- Weakness (CWE)
- CWE-347
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Not given
- NVD analysis
- Modified
- Record last updated
- Jul 15, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
amazon aws-lc-sys amazon:aws-lc-sys | from 0.24.0 before 0.38.0 | NVD |
amazon aws_libcrypto amazon:aws_libcrypto | from 1.41.0 before 1.69.0 | NVD |
References
- https://aws.amazon.com/security/security-bulletins/2026-005-AWS/vendor-advisory
- https://github.com/aws/aws-lc/releases/tag/v1.69.0release-notes
- https://github.com/aws/aws-lc/security/advisories/GHSA-jchq-39cv-q4wjvendor-advisory
- https://access.redhat.com/errata/RHSA-2026:5459
- https://access.redhat.com/security/cve/CVE-2026-3338
- https://bugzilla.redhat.com/show_bug.cgi?id=2444025
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-3338.json
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.