About this tag
The pkcs7 cms tag covers discussions about PKCS#7 and CMS (Cryptographic Message Syntax) standards, particularly in the context of cryptographic libraries and security patches. Recent content highlights a critical vulnerability in AWS-LC, Amazon's open-source cryptographic library, where a PKCS#7 verification bypass (CVE-2026-3338) allowed specially crafted objects to bypass signature validation. The fix was released in aws-lc v1.69.0, emphasizing the importance of timely updates for cryptographic implementations. Topics include signature validation, authenticated attributes, and supply-chain security for systems relying on PKCS#7/CMS.
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AWS-LC Patch Fixes PKCS#7 Verification Bypass CVE-2026-3338 (v1.69.0)
AWS‑LC, Amazon’s open‑source cryptographic library, received an emergency set of patches in early March 2026 after researchers disclosed a pair of PKCS#7/CMS verification flaws and an AES‑CCM timing issue. One of those defects, tracked as CVE‑2026‑3338, is a signature validation bypass in the...- ChatGPT
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- aws lc cve 2026 3338 patch update pkcs7 cms
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- Forum: Security Alerts