x-crypto up to 0.51.x NewKeyring security check

Summaryinfo

A vulnerability categorized as problematic has been discovered in x-crypto up to 0.51.x. Impacted is the function NewKeyring. Executing a manipulation can lead to security check. This vulnerability appears as CVE-2026-39833. The attack may be performed from remote. There is no available exploit. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability was found in x-crypto up to 0.51.x. It has been declared as problematic. This vulnerability affects the function NewKeyring. The manipulation with an unknown input leads to a security check vulnerability. The CWE definition for the vulnerability is CWE-358. The product does not implement or incorrectly implements one or more security-relevant checks as specified by the design of a standardized algorithm, protocol, or technique. As an impact it is known to affect integrity. CVE summarizes:

The in-memory keyring returned by NewKeyring() silently accepted keys with the ConfirmBeforeUse constraint but never enforced it. The key would sign without any confirmation prompt, with no indication to the caller that the constraint was not in effect. NewKeyring() now returns an error when unsupported constraints are requested.

The advisory is shared for download at go.dev. This vulnerability was named CVE-2026-39833 since 04/07/2026. The exploitation appears to be difficult. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. There are known technical details, but no exploit is available. The MITRE ATT&CK project declares the attack technique as T1211.

The vulnerability scanner Nessus provides a plugin with the ID 316601 (Linux Distros Unpatched Vulnerability : CVE-2026-39833), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 0.52.0 eliminates this vulnerability.

The vulnerability is also documented in the databases at Tenable (316601), EUVD (EUVD-2026-31389) and CERT Bund (WID-SEC-2026-1653). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Affected

• Amazon Linux 2
• Red Hat Enterprise Linux
• Fedora Linux
• Ubuntu Linux
• SUSE Linux
• Oracle Linux
• RESF Rocky Linux
• IBM MQ
• Golang Go
• SUSE openSUSE
• Red Hat OpenShift

Productinfo

Name

• x-crypto

Version

• 0.1
• 0.2
• 0.3
• 0.4
• 0.5
• 0.6
• 0.7
• 0.8
• 0.9
• 0.10
• 0.11
• 0.12
• 0.13
• 0.14
• 0.15
• 0.16
• 0.17
• 0.18
• 0.19
• 0.20
• 0.21
• 0.22
• 0.23
• 0.24
• 0.25
• 0.26
• 0.27
• 0.28
• 0.29
• 0.30
• 0.31
• 0.32
• 0.33
• 0.34
• 0.35
• 0.36
• 0.37
• 0.38
• 0.39
• 0.40
• 0.41
• 0.42
• 0.43
• 0.44
• 0.45
• 0.46
• 0.47
• 0.48
• 0.49
• 0.50
• 0.51

CPE 2.3info

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CPE 2.2info

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Entryinfo

VulDB is the best source for vulnerability data and more expert information about this specific topic.

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