CVE-2026-23991
Last modified
CVE-2026-23991 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. go-tuf is a Go implementation of The Update Framework (TUF). Starting in version 2.0.0 and prior to version 2.3.1, if the TUF repository (or any of its mirrors) returns invalid TUF metadata JSON (valid JSON but not well formed TUF metadata), the client will panic during parsing, causing a denial of service. EPSS estimates a 0.53% chance of exploitation in the next 30 days.
Description
go-tuf is a Go implementation of The Update Framework (TUF). Starting in version 2.0.0 and prior to version 2.3.1, if the TUF repository (or any of its mirrors) returns invalid TUF metadata JSON (valid JSON but not well formed TUF metadata), the client will panic during parsing, causing a denial of service. The panic happens before any signature is validated. This means that a compromised repository/mirror/cache can DoS clients without having access to any signing key. Version 2.3.1 fixes the issue. No known workarounds are available.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Theupdateframework | Go-Tuf | >= 2.0.0, < 2.3.1 |
References
Timeline
- Published
- Last Modified
- Status
- Analyzed
Frequently Asked Questions
What is CVE-2026-23991?
How severe is CVE-2026-23991?
How do I fix CVE-2026-23991?
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
Related CVEs from 2026
- CVE-2026-23985A Regular Expression Denial of Service (ReDoS) vulnerability…6.5
- CVE-2026-23986Copier is a library and CLI app for rendering project templa…7.1
- CVE-2026-23988Rufus is a utility that helps format and create bootable USB…7
- CVE-2026-23989REVA is an interoperability platform. Prior to 2.42.3 and 2.…8.1
- CVE-2026-2399CWE-22 Improper Limitation of a Pathname to a Restricted Dir…6.1
- CVE-2026-23990The Flux Operator is a Kubernetes CRD controller that manage…5.3
- CVE-2026-23992go-tuf is a Go implementation of The Update Framework (TUF).…7.5
- CVE-2026-23995EVerest is an EV charging software stack. Prior to version 2…7.8
- CVE-2026-23996FastAPI Api Key provides a backend-agnostic library that pro…3.7
- CVE-2026-23997FacturaScripts is open-source enterprise resource planning a…9
- CVE-2026-23998Fleet is open source device management software. Prior to ve…7.5
- CVE-2026-23999Fleet is open source device management software. In versions…5.5
Are you affected by CVE-2026-23991?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST