What’s Vulnerable › Vulnerabilities

CVE-2026-92791: Uber Kraken through 0.1.29 Path Traversal via tag parameter

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.6% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-09-16 · updated 2026-09-24
• Weakness: CWE-22

Description

Uber Kraken through 0.1.29 fails to validate the tag parameter in the /tags/{tag} endpoint, allowing unauthenticated attackers to traverse outside the configured storage root. Attackers can use percent-encoded parent-directory segments in the tag parameter to read arbitrary files accessible to the testfs backend process.

Affected products

• uber kraken: through 0.1.29

References

• https://github.com/uber/kraken
• https://github.com/uber/kraken/blob/v0.1.27/build-index/tagserver/server.go#L128-L129
• https://github.com/uber/kraken/blob/v0.1.27/lib/backend/namepath/pather.go#L78-L84
• https://github.com/uber/kraken/blob/v0.1.27/lib/backend/testfs/server.go#L165-L173
• https://github.com/uber/kraken/issues/645
• https://www.vulncheck.com/advisories/uber-kraken-through-0.1.29-path-traversal-via-tag-parameter
• https://github.com/uber/kraken/issues/645

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