CVE-2026-6968: high-severity vulnerability in AWS tough
Multiple Path Traversal Variants in awslabs/tough
Published · Updated
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21Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 7.1epss 0.5%
Incomplete path traversal fixes in awslabs/tough before tough-v0.22.0 allow remote authenticated users with delegated signing authority to write files outside intended output directories via absolute target names in copy_target/link_target, symlinked parent directories in save_target, or symlinked metadata filenames in SignedRole::write, because write paths trust the joined destination path without post-resolution containment verification.
We recommend you upgrade to tough-v0.22.0 / tuftool-v0.15.0.
CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:H/SA:L
Related CVEs — AWS tough
In the same product, most dangerous first.
CVE-2025-2888MEDIUMImproper timestamp caching during snapshot rollback in toughEPSS 0.3%CVE-2025-2887MEDIUMFailure to detect delegated target rollback in toughEPSS 0.3%CVE-2025-2886MEDIUMTerminating targets role delegations are not respected in toughEPSS 0.3%CVE-2025-2885MEDIUMRoot metadata version not validated in toughEPSS 0.3%CVE-2026-6966HIGHSignature Threshold Bypass in awslabs/tough Delegated RolesEPSS 0.3%CVE-2026-6967HIGHMissing Delegated Metadata Validation in awslabs/toughEPSS 0.3%
References
https://aws.amazon.com/security/security-bulletins/2026-019-aws/https://crates.io/crates/tough/0.22.0https://crates.io/crates/tuftool/0.15.0https://github.com/awslabs/tough/releases/tag/tough-v0.22.0https://github.com/awslabs/tough/releases/tag/tuftool-v0.15.0https://github.com/awslabs/tough/security/advisories/GHSA-v57p-gppj-p9vg