Get a Demo

Let's Patch It!

Book a short call with one our specialists, we'll walk you through how Endor Patches work, and ask you a few questions about your environment (like your primary programming languages and repository management). We'll also send you an email right after you fill out the form, feel free to reply with any questions you have in advance!

CVE

CVE-2026-4428

CRL Distribution Point Scope Check Logic Error in AWS-LC
Back to all
CVE

CVE-2026-4428

CRL Distribution Point Scope Check Logic Error in AWS-LC

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

(X509VFLAGCRLCHECK). 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.

Package Versions Affected

Package Version
patch Availability
No items found.

Automatically patch vulnerabilities without upgrading

Fix Without Upgrading
Detect compatible fix
Apply safe remediation
Fix with a single pull request

CVSS Version

Severity
Base Score
CVSS Version
Score Vector
C
H
U
9.1
-
4.0
CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/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
C
H
U
0
-
3.1
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
C
H
U
-

Related Resources

No items found.

References

https://crates.io/crates/aws-lc-fips-sys, https://rustsec.org/advisories/RUSTSEC-2026-0042.html, https://aws.amazon.com/security/security-bulletins/2026-010-AWS, https://github.com/aws/aws-lc-rs/security/advisories/GHSA-9f94-5g5w-gf6r

Severity

7.4

CVSS Score
0
10

Basic Information

Ecosystem
Base CVSS
7.4
EPSS Probability
0%
EPSS Percentile
0%
Introduced Version
0.13.0
Fix Available
0.13.13

Fix Critical Vulnerabilities Instantly

Secure your app without upgrading.
Fix Without Upgrading