CVE-2026-3336 describes an improper certificate validation flaw in the PKCS7_verify() function of AWS-LC, allowing an unauthenticated attacker to bypass certificate chain verification for PKCS7 objects with multiple signers, excluding the final one. This vulnerability carries a CVSS score of 7.5 (HIGH), indicating a network-based attack with low complexity and a high impact on integrity. While there is no evidence of active exploitation, public exploit code, or KEV listing, the vulnerability has garnered significant community discussion, with 5 mentions across platforms like Bluesky and Mastodon.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
>= 0.24.0, < 0.38.0CPE matchmatch criteria | cpe:2.3:a:amazon:aws-lc-sys:*:*:*:*:*:rust:*:* | ||
>= 1.41.0, < 1.69.0CPE matchmatch criteria | cpe:2.3:a:amazon:aws_libcrypto:*:*:*:*:*:*:*:* |
CVSS version used by this source: 4.0
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.
The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.