Vulnerability in Uber Kraken
CVE-2026-75625
Kraken agents fail to verify peer-to-peer downloaded blobs against their requested SHA-256 digest before committing to the content-addressable cache, relying only on CRC32 checksums for piece validation. Attackers on the agent-to-agent path or malicious peers can supply substituted content with forged CRC32 corrections that passes per-piece checks, poisoning the cache with attacker-chosen container image layers or manifests that are re-seeded and executed by other hosts.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.0 (Critical). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.002 (13.8th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 14th percentile — 13.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: +0.000
Affected products
Weakness classification (CWE)
References
- github.com/uber/kraken/issues/638 (issue-tracking)
- github.com/uber/kraken (product)
- github.com/uber/kraken/blob/master/lib/torrent/storage/agentstorage/torrent.go (technical-description)
- www.vulncheck.com/advisories/kraken-agents-peer-to-peer-download-cache-poisonin… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-75625?
- CVE-2026-75625 is a critical-severity vulnerability in Uber Kraken, classified under Improper Validation of Integrity Check Value. CVSS score: 9.0/10. Published 2026-08-18.
- How severe is CVE-2026-75625?
- Critical severity. CVSS v3 base score is 9.0 out of 10.