CVE-2026-23992: Github.com/theupdateframework/go tuf/v2 Go-tuf Improperly Validates The Configured Vulnerability

MODERATE
Advisory Identifier: GHSA-fphv-w9fq-2525
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CVSS 5.9
CWE-347
Published
Advisory Summary

CVE-2026-23992 is a MODERATE (CVSS 5.9) go-tuf improperly validates the configured vulnerability (CWE-347: Improper Verification of Cryptographic Signature) affecting Github.com/theupdateframework/go tuf/v2 libraries in the Go ecosystem. The issue involves go-tuf improperly validates the configured threshold for delegations. Remediation is available by upgrading affected packages to version 2.3.1.

CVE-2026-23992 at a Glance

CVE Identifier CVE-2026-23992
GHSA Identifier GHSA-fphv-w9fq-2525
Severity MODERATE
CVSS v3.1 Base Score 5.9
CWE Classification CWE-347: Improper Verification of Cryptographic Signature
Affected Product Github.com/theupdateframework/go tuf/v2
Package Ecosystem Go
Published Date
Last Updated

Security Impact

CVSS: 5.9

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N).

Attack Vector Network (AV:N)
Attack Complexity High (AC:H)
Privileges Required None (PR:N)
User Interaction None (UI:N)
Scope Unchanged (S:U)
Confidentiality None (C:N)
Integrity High (I:H)
Availability None (A:N)

How to Fix CVE-2026-23992

To remediate this vulnerability, upgrade all affected Github.com/theupdateframework/go tuf/v2 dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

github.com/theupdateframework/go-tuf/v2 fixed: 2.3.1 
Upgrade github.com/theupdateframework/go-tuf/v2 to 2.3.1
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

inspect dependencies for github.com/theupdateframework/go-tuf/v2

How to Check if You Are Affected

To determine whether your application is affected by CVE-2026-23992, inspect your project dependencies for Github.com/theupdateframework/go tuf/v2:

inspect dependencies for github.com/theupdateframework/go-tuf/v2

Analyze the terminal output to locate any version of Github.com/theupdateframework/go tuf/v2 in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 2.3.1), your application is affected.

Note: Verify declared build manifests and deployed runtime container environments.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-347: Improper Verification of Cryptographic Signature, where the product does not verify, or incorrectly verifies, the cryptographic signature for data. In Github.com/theupdateframework/go tuf/v2, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

# Security Disclosure: Improper validation of configured threshold for delegations ## Summary A compromised or misconfigured TUF repository can have the configured value of signature thresholds set to 0, which effectively disables signature verification. ## Impact Unathorized modification to TUF metadata files is possible at rest, or during transit as no integrity checks are made. ## Patches Upgrade to v2.3.1 ## Workarounds Always make sure that the TUF metadata roles are configured with a threshold of at least 1. ## Affected code: The `metadata.VerifyDelegate` did not verify the configured threshold prior to comparison. This means that a misconfigured TUF repository could disable the signature verification by setting the threshold to 0, or a negative value (and so always make the signature threshold computation to pass).

CVE-2026-23992 Affected Github.com/theupdateframework/go tuf/v2 Versions

1 component(s)
Fixed Versions:
2.3.1
Product / Package Ecosystem Affected Versions Fixed Version
github.com/theupdateframework/go-tuf/v2
golang/github.com/theupdateframework/go-tuf/v2
Go
< 2.3.1
2.3.1

References

GitHub Advisory / Wiki ADVISORY
https://github.com/theupdateframework/go-tuf/security/advisories/GHSA-fphv-w9fq-2525
NVD — CVE-2026-23992 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-23992
Security Fix Commit FIX COMMIT
https://github.com/theupdateframework/go-tuf/commit/b38d91fdbc69dfe31fe9230d97dafe527ea854a0
Github.com/theupdateframework/go tuf/v2 Source Repository REPOSITORY
https://github.com/theupdateframework/go-tuf
Github.com/theupdateframework/go tuf/v2 Release RELEASE
https://github.com/theupdateframework/go-tuf/releases/tag/v2.3.1

Frequently Asked Questions

What is CVE-2026-23992?
CVE-2026-23992 is a security vulnerability in Github.com/theupdateframework/go tuf/v2 involving go-tuf improperly validates the configured threshold for delegations under CWE-347: Improper Verification of Cryptographic Signature.
Which Github.com/theupdateframework/go tuf/v2 versions are affected?
Affected versions include releases prior to 2.3.1 across affected packages: github.com/theupdateframework/go-tuf/v2.
What version fixes CVE-2026-23992?
Upgrading to 2.3.1 (or the latest patched release for your respective branch) resolves the vulnerability.
Is github.com/theupdateframework/go-tuf/v2 affected?
Yes, github.com/theupdateframework/go-tuf/v2 is affected in releases prior to 2.3.1. Upgrade your dependency to 2.3.1 or later.
What is the CVSS score of CVE-2026-23992?
CVE-2026-23992 has a CVSS v3.1 base score of 5.9 (MODERATE) with vector string CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N.
What CWE is associated with CVE-2026-23992?
CVE-2026-23992 is classified under CWE-347: Improper Verification of Cryptographic Signature (The product does not verify, or incorrectly verifies, the cryptographic signature for data.).
How can I check Go dependencies for CVE-2026-23992?
Run the dependency tree command: 'inspect dependencies for github.com/theupdateframework/go-tuf/v2'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-fphv-w9fq-2525",
  "modified" : "2026-01-22T15:43:46Z",
  "published" : "2026-01-21T16:19:32Z",
  "aliases" : [ "CVE-2026-23992" ],
  "summary" : "go-tuf improperly validates the configured threshold for delegations",
  "details" : "# Security Disclosure: Improper validation of configured threshold for delegations\n\n## Summary\n\nA compromised or misconfigured TUF repository can have the configured value of signature thresholds set to 0, which effectively disables signature verification. \n\n## Impact\n\nUnathorized modification to TUF metadata files is possible at rest, or during transit as no integrity checks are made.\n\n## Patches\n\nUpgrade to v2.3.1\n\n## Workarounds\n\nAlways make sure that the TUF metadata roles are configured with a threshold of at least 1.\n\n## Affected code:\n\nThe `metadata.VerifyDelegate` did not verify the configured threshold prior to comparison. This means that a misconfigured TUF repository could disable the signature verification by setting the threshold to 0, or a negative value (and so always make the signature threshold computation to pass).",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Go",
      "name" : "github.com/theupdateframework/go-tuf/v2"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "2.3.1"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/theupdateframework/go-tuf/security/advisories/GHSA-fphv-w9fq-2525"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-23992"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/theupdateframework/go-tuf/commit/b38d91fdbc69dfe31fe9230d97dafe527ea854a0"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/theupdateframework/go-tuf"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/theupdateframework/go-tuf/releases/tag/v2.3.1"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-347" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-01-21T16:19:32Z",
    "nvd_published_at" : "2026-01-22T03:15:47Z"
  }
}