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.

Attack Vector Network

Attack Complexity Low

Privileges Required None

Attack Requirements Present

User Interaction None

Vulnerable System Confidentiality Impact None

Vulnerable System Integrity Impact High

Vulnerable System Availability Impact None

Subsequent System Confidentiality Impact High

Subsequent System Integrity Impact High

Subsequent System Availability Impact High

Attack Vector Network

Attack Complexity High

Privileges Required None

Scope Changed

Confidentiality Impact High

Integrity Impact High

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Key SSVC decision points have not yet been added.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
uber kraken unaffected
Version Status Constraints
0 affected ≤ 0.1.27

No data.

No data.

No data.

Project Subscriptions

Vendors Products
Uber Subscribe
Kraken Subscribe
Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://github.com/uber/kraken cve-icon cve-icon
https://github.com/uber/kraken/blob/master/lib/torrent/storage/agentstorage/torrent.go cve-icon cve-icon
https://github.com/uber/kraken/issues/638 cve-icon cve-icon cve-icon
https://www.vulncheck.com/advisories/kraken-agents-peer-to-peer-download-cache-poisoning-via-digest-verification-bypass cve-icon cve-icon
History

Tue, 18 Aug 2026 19:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Tue, 18 Aug 2026 18:00:00 +0000

Type Values Removed Values Added
Description 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.
Title Kraken Agents Peer-to-Peer Download Cache Poisoning via Digest Verification Bypass
First Time appeared Uber
Uber kraken
Weaknesses CWE-354
CPEs cpe:2.3:a:uber:kraken:*:*:*:*:*:*:*:*
Vendors & Products Uber
Uber kraken
References
Metrics cvssV3_1

{'score': 9, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H'}

cvssV4_0

{'score': 9.1, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:H/VA:N/SC:H/SI:H/SA:H'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published:

Updated: 2026-08-18T19:06:15.419Z

Reserved: 2026-08-18T01:03:25.540Z

Link: CVE-2026-75625

cve-icon Vulnrichment

Updated: 2026-08-18T19:05:52.811Z

cve-icon NVD

Status : Received

Published: 2026-08-18T18:19:34.343

Modified: 2026-08-18T18:19:34.343

Link: CVE-2026-75625

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses