Security readout for executives and security teams
Plain-English summary
CVE-2026-23992 affects go-tuf, a Go library for The Update Framework. In vulnerable versions, a repository can be configured with a signature threshold of 0, effectively turning off signature verification. That can allow unauthorized changes to update metadata if the repository is compromised or misconfigured.
Executive priority
Prioritize remediation for software update, artifact distribution, or supply-chain systems using go-tuf. The issue is moderate overall, but it affects trust in update metadata, which can create business risk if misconfigured repositories are present.
Technical view
go-tuf versions 2.0.0 through before 2.3.1 improperly validate delegation signature thresholds. A threshold of 0 disables integrity verification for TUF metadata, enabling unauthorized metadata modification at rest or in transit. The issue is classified as CWE-347 with CVSS 3.1 score 5.9.
Likely exposure
Exposure is likely limited to systems or products that embed go-tuf versions >=2.0.0 and <2.3.1, especially where TUF repositories or delegations may be misconfigured with threshold 0.
Exploitation context
The sources do not report active exploitation. Successful abuse appears to require a compromised or misconfigured TUF repository using a zero signature threshold, making attack complexity high but integrity impact significant.
Researcher notes
Evidence is limited to the CVE record, GitHub advisory, and fixing commit. No public exploitation is cited. Focus analysis on dependency reachability, repository metadata configuration, and whether zero-threshold delegations exist in operational TUF repositories.
Mitigation direction
- Upgrade go-tuf to version 2.3.1 or later.
- Ensure all TUF metadata roles use a signature threshold of at least 1.
- Review vendor guidance for products that bundle or depend on go-tuf.
Validation and detection
- Inventory applications and build systems using go-tuf.
- Identify dependency versions >=2.0.0 and <2.3.1.
- Review TUF repository role and delegation thresholds for any value of 0.
- Confirm updated components use go-tuf 2.3.1 or later.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
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ATT&CK lookup starting points
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CWE-347: Exact CWE lookup
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Open ATT&CK lookupCVE-2026-23992 mapping review
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Open ATT&CK lookup- Severity
- Medium
- CVSS
- 5.9 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N2.23.6Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
5.9MediumVector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N
Source materials
- CVE List V5 sourceCVE List V5
- https://github.com/theupdateframework/go-tuf/security/advisories/GHSA-fphv-w9fq-2525CVE reference · x_refsource_CONFIRM
- https://github.com/theupdateframework/go-tuf/commit/b38d91fdbc69dfe31fe9230d97dafe527ea854a0CVE reference · x_refsource_MISC
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Improper Verification of Cryptographic Signature
Improper Verification of Cryptographic Signature represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.