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CVE-2026-6967

Missing Delegated Metadata Validation in awslabs/tough

Published: Apr 24, 2026Updated: May 6, 2026 Sources: CVE List NVDCWE-345
NVD MITRE
5.9CVSSMEDIUM
EPSS Score
0.2%
Top 90.0%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

Description

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 Vector Breakdown

AV:NAC:HPR:LUI:NS:UC:NI:HA:L
Exploitability
AV:NAttack Vector
Network
AC:HAttack Complexity
High
PR:LPrivileges Required
Low
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:NConfidentiality
None
I:HIntegrity
High
A:LAvailability
Low
Open in CVSS calculator →

Weaknesses

CWE-345

Affected Products

toughamazon
SaaS
Cloud & SaaS / cloud-platform
tuftoolamazon
SaaS
Cloud & SaaS / cloud-platform
toughAWS
Mixed
Cloud & SaaS / cloud-platform
tuftoolAWS
Mixed
Cloud & SaaS / cloud-platform
amazoncommercialUSCloud & SaaS
awscommercialUSCloud & SaaSaka aws

Attack Graph

Products CVE Techniques Tactics

Click technique nodes to view MITRE ATT&CK details. Scroll to zoom, drag to pan.

Exploitability

Official Patch Available

MITRE ATT&CK

1 technique
Collection
View detailed technique mapping

References

https://aws.amazon.com/security/security-bulletins/2026-019-aws/
aws.amazon.com
https://crates.io/crates/tough/0.22.0
crates.io
https://crates.io/crates/tuftool/0.15.0
crates.io
and 3 more references View all →

Timeline

Published
Apr 24, 2026
Last Updated
May 6, 2026

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