CVE-2026-6967

MEDIUMNVD 5.95.9—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 5.9 under NVD CVSS v3. EPSS exploit probability: 0.0%, top 93% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, nvd
5.9
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 0%CVSS: 5.9Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

Missing expiration, hash, and length enforcement in delegated metadata validation in awslabs/tough before tough-v0.22.0 allows remote authenticated users with delegated signing authority to bypass TUF specification integrity checks for delegated targets metadata and poison the local metadata cache, because load_delegations does not apply the same validation checks as the top-level targets metadata path.

We recommend you upgrade to tough-v0.22.0 / tuftool-v0.15.0.

CVSS v3
5.9
EG Score
5.9(medium)
EPSS
15.8%
KEV
Not listed

Published

April 24, 2026

Last Modified

May 6, 2026

Advisory Details (6)

Auto-updated May 6, 2026
Patch available. Sources: github.
github Patch Available

Missing Delegated Metadata Validation in awslabs/tough · Advisory · awslabs/tough · GitHub

https://github.com/awslabs/tough/security/advisories/GHSA-4v58-8p28-2rq3
generic

Release tuftool-v0.15.0 · awslabs/tough · GitHub

https://github.com/awslabs/tough/releases/tag/tuftool-v0.15.0
generic

Release tough-v0.22.0 · awslabs/tough · GitHub

https://github.com/awslabs/tough/releases/tag/tough-v0.22.0
generic

crates.io: Rust Package Registry

https://crates.io/crates/tuftool/0.15.0
generic

crates.io: Rust Package Registry

https://crates.io/crates/tough/0.22.0
generic

Issues in tough library and tuftool CLI utility

https://aws.amazon.com/security/security-bulletins/2026-019-aws/

Vendor Advisories for CVE-2026-6967(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Affected Packages

(2 across 1 ecosystem)
crates.io(2)
PackageVulnerable rangeFixed inDependents
tough—0.22.0—
tuftool—0.15.0—

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 10× in last 7d / 45× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-07-06 16:27 UTCEPSS rescore
  2. 2026-07-06 16:27 UTCEPSS rescore
  3. 2026-07-06 02:23 UTCEPSS rescore
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  5. 2026-07-05 02:31 UTCEPSS rescore
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  7. 2026-07-04 06:31 UTCEPSS rescore
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  9. 2026-07-01 15:07 UTCEPSS rescore
  10. 2026-06-30 23:22 UTCEPSS rescore
  11. 2026-06-29 14:06 UTCEPSS rescore
  12. 2026-06-28 14:07 UTCEPSS rescore
  13. 2026-06-28 04:56 UTCEPSS rescore
  14. 2026-06-27 03:08 UTCEPSS rescore
  15. 2026-06-25 13:50 UTCEPSS rescore
  16. 2026-06-24 14:05 UTCEPSS rescore
  17. 2026-06-23 21:33 UTCEPSS rescore
  18. 2026-06-22 14:25 UTCEPSS rescore
  19. 2026-06-22 14:25 UTCEPSS rescore
  20. 2026-06-21 14:56 UTCEPSS rescore
  21. 2026-06-21 14:56 UTCEPSS rescore
  22. 2026-06-21 01:59 UTCEPSS rescore
  23. 2026-06-21 01:59 UTCEPSS rescore
  24. 2026-06-19 19:26 UTCEPSS rescore
  25. 2026-06-19 19:26 UTCEPSS rescore
Show 49 more
  1. 2026-06-18 17:52 UTCEPSS rescore
  2. 2026-06-18 17:52 UTCEPSS rescore
  3. 2026-06-17 17:53 UTCEPSS rescore
  4. 2026-06-16 17:53 UTCEPSS rescore
  5. 2026-06-15 17:49 UTCEPSS rescore
  6. 2026-06-15 17:49 UTCEPSS rescore
  7. 2026-06-14 23:18 UTCEPSS rescore
  8. 2026-06-14 11:33 UTCEG score recompute
  9. 2026-06-13 23:00 UTCEPSS rescore
  10. 2026-06-12 23:12 UTCEPSS rescore
  11. 2026-06-12 23:12 UTCEPSS rescore
  12. 2026-06-11 14:00 UTCEPSS rescore
  13. 2026-06-11 12:16 UTCEG score recompute
  14. 2026-06-10 22:19 UTCEPSS rescore
  15. 2026-06-10 13:22 UTCEPSS rescore
  16. 2026-06-10 04:57 UTCEG score recompute
  17. 2026-06-09 03:07 UTCEG score recompute
  18. 2026-06-08 14:17 UTCEPSS rescore
  19. 2026-06-08 00:12 UTCEG score recompute
  20. 2026-06-07 15:25 UTCEPSS rescore
  21. 2026-06-06 22:22 UTCEG score recompute
  22. 2026-06-06 13:47 UTCEPSS rescore
  23. 2026-06-05 22:47 UTCEPSS rescore
  24. 2026-06-05 20:32 UTCEG score recompute
  25. 2026-06-05 06:10 UTCEPSS rescore
  26. 2026-06-04 18:29 UTCEG score recompute
  27. 2026-06-04 13:12 UTCEPSS rescore
  28. 2026-06-03 16:39 UTCEG score recompute
  29. 2026-06-02 20:13 UTCEPSS rescore
  30. 2026-06-02 14:48 UTCEG score recompute
  31. 2026-06-01 13:52 UTCEPSS rescore
  32. 2026-06-01 12:58 UTCEG score recompute
  33. 2026-05-31 22:30 UTCEPSS rescore
  34. 2026-05-31 22:30 UTCEPSS rescore
  35. 2026-05-31 00:16 UTCEPSS rescore
  36. 2026-05-31 00:16 UTCEPSS rescore
  37. 2026-05-29 13:44 UTCEPSS rescore
  38. 2026-05-29 13:44 UTCEPSS rescore
  39. 2026-05-28 13:44 UTCEPSS rescore
  40. 2026-05-28 13:44 UTCEPSS rescore
  41. 2026-05-27 13:40 UTCEPSS rescore
  42. 2026-05-27 13:40 UTCEPSS rescore
  43. 2026-05-26 13:44 UTCEPSS rescore
  44. 2026-05-26 07:18 UTCEPSS rescore
  45. 2026-05-23 00:08 UTCEG score recompute
  46. 2026-05-21 22:43 UTCEPSS rescore
  47. 2026-05-20 22:38 UTCEPSS rescore
  48. 2026-05-20 15:44 UTCEG score recompute
  49. 2026-05-20 11:22 UTCEPSS rescore

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-6967?
CVE-2026-6967 is a medium vulnerability published on April 24, 2026. Missing expiration, hash, and length enforcement in delegated metadata validation in awslabs/tough before tough-v0.22.0 allows remote authenticated users with delegated signing authority to bypass TUF specification integrity checks for delegated targets metadata and poison the local metadata cache,…
When was CVE-2026-6967 disclosed?
CVE-2026-6967 was first published in the National Vulnerability Database on April 24, 2026, with the most recent update on May 6, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-6967 actively exploited?
CVE-2026-6967 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 15.8% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-6967?
CVE-2026-6967 has a CVSS v3 base score of 5.9 (NVD).
How do I remediate CVE-2026-6967?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-6967, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-6967

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