CVE-2026-42508

ADVISORY - github

Summary

Previously, a revoked 'SignatureKey' belonging to a CA was not correctly checked for revocation. Now, both the 'key' and 'key.SignatureKey' are checked for @revoked.

EPSS Score⁠: 0.00568 (0.444)

Common Weakness Enumeration (CWE)

ADVISORY - nist

CWE-295⁠

Improper Certificate Validation

ADVISORY - github

CWE-295⁠

Improper Certificate Validation

Impacted images

Advisories

GitHub

CREATED

2 months ago

UPDATED

30 days ago

ADVISORY IDGHSA-5cgq-3rg8-m6cv⁠

EXPLOITABILITY SCORE

3.9

EXPLOITS FOUND

COMMON WEAKNESS ENUMERATION (CWE)

CWE-295⁠

CVSS SCORE

9.1critical

Package	Type	OS Name	OS Version	Affected Ranges	Fix Versions
golang.org/x/crypto	golang	-	-	<0.52.0	0.52.0

CVSS:3 Severity and metrics

The CVSS metrics represent different qualitative aspects of a vulnerability that impact the overall score, as defined by the CVSS Specification⁠.

The vulnerable component is bound to the network stack, but the attack is limited at the protocol level to a logically adjacent topology. This can mean an attack must be launched from the same shared physical (e.g., Bluetooth or IEEE 802.11) or logical (e.g., local IP subnet) network, or from within a secure or otherwise limited administrative domain (e.g., MPLS, secure VPN to an administrative network zone). One example of an Adjacent attack would be an ARP (IPv4) or neighbor discovery (IPv6) flood leading to a denial of service on the local LAN segment (e.g., CVE-2013-6014).

Specialized access conditions or extenuating circumstances do not exist. An attacker can expect repeatable success when attacking the vulnerable component.

The attacker is unauthorized prior to attack, and therefore does not require any access to settings or files of the vulnerable system to carry out an attack.

The vulnerable system can be exploited without interaction from any user.

An exploited vulnerability can only affect resources managed by the same security authority. In this case, the vulnerable component and the impacted component are either the same, or both are managed by the same security authority.

There is a total loss of confidentiality, resulting in all resources within the impacted component being divulged to the attacker. Alternatively, access to only some restricted information is obtained, but the disclosed information presents a direct, serious impact. For example, an attacker steals the administrator's password, or private encryption keys of a web server.

There is a total loss of integrity, or a complete loss of protection. For example, the attacker is able to modify any or all files protected by the impacted component. Alternatively, only some files can be modified, but malicious modification would present a direct, serious consequence to the impacted component.

There is no impact to availability within the impacted component.

NIST

CREATED

3 months ago

UPDATED

2 days ago

ADVISORY IDCVE-2026-42508⁠

EXPLOITABILITY SCORE

3.9

EXPLOITS FOUND

COMMON WEAKNESS ENUMERATION (CWE)

CWE-295⁠

CVSS SCORE

9.1critical

Debian

CREATED

3 months ago

UPDATED

1 month ago

ADVISORY IDCVE-2026-42508⁠

EXPLOITABILITY SCORE

EXPLOITS FOUND

COMMON WEAKNESS ENUMERATION (CWE)-

RATING UNAVAILABLE FROM ADVISORY

Ubuntu

CREATED

3 months ago

UPDATED

2 months ago

ADVISORY IDCVE-2026-42508⁠

EXPLOITABILITY SCORE

EXPLOITS FOUND

COMMON WEAKNESS ENUMERATION (CWE)-

CVSS SCORE

N/Amedium

GoLang

CREATED

3 months ago

UPDATED

2 days ago

ADVISORY IDGO-2026-5021⁠

EXPLOITABILITY SCORE

EXPLOITS FOUND

COMMON WEAKNESS ENUMERATION (CWE)-

RATING UNAVAILABLE FROM ADVISORY

CVE-2026-42508

Summary

Common Weakness Enumeration (CWE)

CWE-295⁠

CWE-295⁠

Advisories

GitHub

CVSS SCORE

Attack Vector (AV)Network

Attack Complexity (AC)Low

Privileges Required (PR)None

User Interaction (UI)None

Scope (S)Unchanged

Confidentiality (C)High

Integrity (I)High

Availability (A)None

NIST

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Ubuntu

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GoLang

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Amazon

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Amazon

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Rocky

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Oracle

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