CVE-2026-92791: Path Traversal (CVSS 7.5)

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.

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CVSS v3.1 Score

7.5

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Weakness Type (CWE)

CWE-22 Path Traversal

References

Other 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

Frequently Asked Questions

What is CVE-2026-92791? +

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. It has a CVSS v3.1 base score of 7.5 (HIGH).

How severe is CVE-2026-92791? +

CVE-2026-92791 has a CVSS v3.1 score of 7.5 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching.

How do I check if I'm vulnerable to CVE-2026-92791? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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