CVE-2026-4428

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.

CVSS v3 7.4 HIGH

7.4^/10

CVSS v3 : HIGH

Vector :

Exploitability : 2.2 / Impact : 5.2

Attack Vector NETWORK

Attack Complexity HIGH

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://aws.amazon.com/security/security-bulletins/2026-010-AWS/
https://github.com/aws/aws-lc/releases/tag/v1.71.0

Configurations

No configuration.

History

17 Jun 2026, 10:56

Type	Values Removed	Values Added
Summary		(es) Un error lógico en la validación del punto de distribución de CRL en AWS-LC anterior a 1.71.0 provoca que las CRL particionadas sean rechazadas incorrectamente por estar fuera de alcance, lo que permite que un certificado revocado eluda las comprobaciones de revocación de certificados. Para remediar este problema, los usuarios deben actualizar a AWS-LC 1.71.0 o AWS-LC-FIPS-3.3.0.

19 Mar 2026, 21:17

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-03-19 21:17

Updated : 2026-06-17 10:56

NVD link : CVE-2026-4428

Mitre link : CVE-2026-4428

CVE.ORG link : CVE-2026-4428

JSON object : View

Products Affected

No product.

CWE

CWE-299

Improper Check for Certificate Revocation

{"id": "CVE-2026-4428", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-4428", "role": "CISA Coordinator", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "total"}], "version": "2.0.3", "timestamp": "2026-03-25T14:13:28.437867Z"}}], "cvssMetricV31": [{"type": "Secondary", "source": "ff89ba41-3aa1-4d27-914a-91399e9639e5", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.4, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "HIGH", "availabilityImpact": "NONE", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}, "impactScore": 5.2, "exploitabilityScore": 2.2}], "cvssMetricV40": [{"type": "Secondary", "source": "ff89ba41-3aa1-4d27-914a-91399e9639e5", "cvssData": {"Safety": "NOT_DEFINED", "version": "4.0", "Recovery": "NOT_DEFINED", "baseScore": 9.1, "Automatable": "NOT_DEFINED", "attackVector": "NETWORK", "baseSeverity": "CRITICAL", "valueDensity": "NOT_DEFINED", "vectorString": "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", "exploitMaturity": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED", "userInteraction": "NONE", "attackComplexity": "HIGH", "attackRequirements": "PRESENT", "privilegesRequired": "NONE", "subIntegrityImpact": "NONE", "vulnIntegrityImpact": "HIGH", "integrityRequirement": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "vulnAvailabilityImpact": "NONE", "availabilityRequirement": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "subConfidentialityImpact": "NONE", "vulnConfidentialityImpact": "HIGH", "confidentialityRequirement": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED"}}]}, "affected": [{"source": "ff89ba41-3aa1-4d27-914a-91399e9639e5", "affectedData": [{"vendor": "AWS", "product": "AWS-LC", "versions": [{"status": "affected", "version": "1.24.0", "lessThan": "1.71.0", "versionType": "custom"}], "defaultStatus": "unaffected"}, {"vendor": "AWS", "product": "AWS-LC-FIPS", "versions": [{"status": "affected", "version": "3.0.0", "lessThan": "3.3.0", "versionType": "custom"}], "defaultStatus": "unaffected"}]}], "published": "2026-03-19T21:17:14.170", "references": [{"url": "https://aws.amazon.com/security/security-bulletins/2026-010-AWS/", "source": "ff89ba41-3aa1-4d27-914a-91399e9639e5"}, {"url": "https://github.com/aws/aws-lc/releases/tag/v1.71.0", "source": "ff89ba41-3aa1-4d27-914a-91399e9639e5"}], "vulnStatus": "Awaiting Analysis", "weaknesses": [{"type": "Secondary", "source": "ff89ba41-3aa1-4d27-914a-91399e9639e5", "description": [{"lang": "en", "value": "CWE-299"}]}], "descriptions": [{"lang": "en", "value": "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.\n\nTo remediate this issue, users should upgrade to AWS-LC 1.71.0 or AWS-LC-FIPS-3.3.0."}, {"lang": "es", "value": "Un error l\u00f3gico en la validaci\u00f3n del punto de distribuci\u00f3n de CRL en AWS-LC anterior a 1.71.0 provoca que las CRL particionadas sean rechazadas incorrectamente por estar fuera de alcance, lo que permite que un certificado revocado eluda las comprobaciones de revocaci\u00f3n de certificados.\n\nPara remediar este problema, los usuarios deben actualizar a AWS-LC 1.71.0 o AWS-LC-FIPS-3.3.0."}], "lastModified": "2026-06-17T10:56:33.390", "sourceIdentifier": "ff89ba41-3aa1-4d27-914a-91399e9639e5"}