CVE-2026-4428

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Source
https://cve.org/CVERecord?id=CVE-2026-4428
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-4428.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-4428
Aliases
Downstream
Published
2026-03-19T20:37:53.851Z
Modified
2026-08-12T16:24:28.125230Z
Severity
  • 9.1 (Critical) CVSS_V4 - 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 CVSS Calculator
Summary
CRL Distribution Point Scope Check Logic Error in AWS-LC
Details

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 1.71.0 or AWS-LC-FIPS-3.3.0.

Database specific 
{
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/4xxx/CVE-2026-4428.json",
    "cwe_ids": [
        "CWE-299"
    ],
    "cna_assigner": "AMZN"
}
References

Affected packages

Git / github.com/aws/aws-lc

Affected ranges

Type
GIT
Repo
https://github.com/aws/aws-lc
Events
Introduced
6284822a2e30d9a8497ba7e07bf3f506808912f2
Fixed
47389586f8aa77c83245173793f4d44ed1d6c3a8
Introduced
190be0667cf1f7b39bed2c96760f08a6295b652b
Fixed
83d85826595641bb2f23c6108f2e031fcd5cd505
Database specific
Show details 
{
    "source": "AFFECTED_FIELD",
    "extracted_events": [
        {
            "introduced": "1.24.0"
        },
        {
            "fixed": "1.71.0"
        },
        {
            "introduced": "3.0.0"
        },
        {
            "fixed": "3.3.0"
        }
    ]
}

Affected versions

AWS-LC-FIPS-3.*
AWS-LC-FIPS-3.0.0
AWS-LC-FIPS-3.1.0
AWS-LC-FIPS-3.2.0
AWS-LC-FIPS-NETOS-v1.*
AWS-LC-FIPS-NETOS-v1.29.1
v1.*
v1.24.0
v1.24.1
v1.25.0
v1.26.0
v1.27.0
v1.28.0
v1.29.0
v1.30.0
v1.30.1
v1.31.0
v1.32.0
v1.33.0
v1.34.0
v1.34.1
v1.34.2
v1.35.0
v1.35.1
v1.36.0
v1.36.1
v1.37.0
v1.38.0
v1.39.0
v1.40.0
v1.41.0
v1.41.1
v1.42.0
v1.43.0
v1.44.0
v1.45.0
v1.46.0
v1.46.1
v1.47.0
v1.48.0
v1.48.1
v1.48.2
v1.48.3
v1.48.4
v1.48.5
v1.49.0
v1.49.1
v1.50.0
v1.50.1
v1.51.0
v1.51.1
v1.51.2
v1.52.0
v1.52.1
v1.53.0
v1.53.1
v1.54.0
v1.55.0
v1.56.0
v1.57.0
v1.57.1
v1.58.0
v1.58.1
v1.59.0
v1.60.0
v1.61.0
v1.61.1
v1.61.2
v1.61.3
v1.61.4
v1.62.0
v1.62.1
v1.63.0
v1.64.0
v1.65.0
v1.65.1
v1.66.0
v1.66.1
v1.66.2
v1.67.0
v1.68.0
v1.69.0
v1.70.0

Database specific

vanir_signatures 
[
    {
        "id": "CVE-2026-4428-4fef2854",
        "target": {
            "function": "crl_crldp_check",
            "file": "crypto/x509/x509_vfy.c"
        },
        "deprecated": false,
        "digest": {
            "function_hash": "315553051490645340434301782701760588989",
            "length": 621.0
        },
        "signature_version": "v1",
        "source": "https://github.com/aws/aws-lc/commit/83d85826595641bb2f23c6108f2e031fcd5cd505",
        "signature_type": "Function"
    },
    {
        "id": "CVE-2026-4428-858c9e2d",
        "target": {
            "file": "crypto/x509/x509_test.cc"
        },
        "deprecated": false,
        "digest": {
            "threshold": 0.9,
            "line_hashes": [
                "67546155362554212794720633293763579087",
                "60173126581954837125601684341052211646",
                "171474131814531793932529892352574222281",
                "179823018402105157128282776881034288750",
                "126559276406436210284828049326390844784",
                "67089962090722491870780077947163980547"
            ]
        },
        "signature_version": "v1",
        "source": "https://github.com/aws/aws-lc/commit/83d85826595641bb2f23c6108f2e031fcd5cd505",
        "signature_type": "Line"
    },
    {
        "id": "CVE-2026-4428-a4bd71ac",
        "target": {
            "file": "crypto/x509/x509_vfy.c"
        },
        "deprecated": false,
        "digest": {
            "threshold": 0.9,
            "line_hashes": [
                "211160966742197397106823759224917572755",
                "35047788452717782869365276537476936",
                "280559450770590975653021767826529623376",
                "153990721801522824870147534967993801522",
                "27068015445326099177373872550785267766",
                "217631864836764034369360838167683719714",
                "196990455326174579627504348853721303576",
                "152716710549071912863749139833951271141",
                "230925751211779502697051772006460993554",
                "90797013554136129170406954188265437728",
                "186246592097486328349711158695014349986"
            ]
        },
        "signature_version": "v1",
        "source": "https://github.com/aws/aws-lc/commit/47389586f8aa77c83245173793f4d44ed1d6c3a8",
        "signature_type": "Line"
    },
    {
        "id": "CVE-2026-4428-aa813e60",
        "target": {
            "file": "crypto/x509/x509_vfy.c"
        },
        "deprecated": false,
        "digest": {
            "threshold": 0.9,
            "line_hashes": [
                "211160966742197397106823759224917572755",
                "35047788452717782869365276537476936",
                "280559450770590975653021767826529623376",
                "153990721801522824870147534967993801522",
                "27068015445326099177373872550785267766",
                "217631864836764034369360838167683719714",
                "196990455326174579627504348853721303576",
                "152716710549071912863749139833951271141",
                "230925751211779502697051772006460993554",
                "90797013554136129170406954188265437728",
                "186246592097486328349711158695014349986"
            ]
        },
        "signature_version": "v1",
        "source": "https://github.com/aws/aws-lc/commit/83d85826595641bb2f23c6108f2e031fcd5cd505",
        "signature_type": "Line"
    },
    {
        "id": "CVE-2026-4428-cb29f789",
        "target": {
            "function": "crl_crldp_check",
            "file": "crypto/x509/x509_vfy.c"
        },
        "deprecated": false,
        "digest": {
            "function_hash": "315553051490645340434301782701760588989",
            "length": 621.0
        },
        "signature_version": "v1",
        "source": "https://github.com/aws/aws-lc/commit/47389586f8aa77c83245173793f4d44ed1d6c3a8",
        "signature_type": "Function"
    },
    {
        "id": "CVE-2026-4428-e2336e74",
        "target": {
            "file": "crypto/x509/x509_test.cc"
        },
        "deprecated": false,
        "digest": {
            "threshold": 0.9,
            "line_hashes": [
                "67546155362554212794720633293763579087",
                "60173126581954837125601684341052211646",
                "171474131814531793932529892352574222281",
                "179823018402105157128282776881034288750",
                "126559276406436210284828049326390844784",
                "67089962090722491870780077947163980547"
            ]
        },
        "signature_version": "v1",
        "source": "https://github.com/aws/aws-lc/commit/47389586f8aa77c83245173793f4d44ed1d6c3a8",
        "signature_type": "Line"
    }
]
source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-4428.json"
vanir_signatures_modified 
"2026-08-12T16:24:28Z"