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Critical

Kraken Agents Peer-to-Peer Download Cache Poisoning via Digest Verification Bypass

Type: advisorySources: OSV

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.

Products
Not specified
Affected versions
Not specified
Fixed versions
Not specified
CVEs
CVE-2026-75625
Confirmed fixed CVEs
Not specified
Updated in this feed
3 Nov 2026, 15:22 UTC · Revision 1

Source evidence

Kraken Agents Peer-to-Peer Download Cache Poisoning via Digest Verification Bypass

core-osv · Original source

Published 18 Aug 2026, 17:56 UTC

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.

osv:CVE-2026-75625
Complete source record
{
  "id": "620019b380bdbdfd0f22f1da5026647d3ea839e264704ceaf31308d511229c32",
  "url": "https://osv.dev/vulnerability/CVE-2026-75625",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Kraken Agents Peer-to-Peer Download Cache Poisoning via Digest Verification Bypass",
    "summary": "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.",
    "evidence": "osv:CVE-2026-75625",
    "products": [],
    "severity": "critical",
    "structured": {
      "id": "CVE-2026-75625",
      "aliases": [
        "CVE-2026-75625"
      ],
      "metrics": [
        {
          "type": "CVSS_V4",
          "score": "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"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/uber/kraken",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "last_affected": "a4732524b1932af4e5c742cdf12a9a9ba4532148"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "last_affected": "0.1.27"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StandardRange"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v0.1.27",
            "v0.1.26",
            "v0.1.25",
            "v0.1.24",
            "v0.1.23",
            "v0.1.22",
            "v0.1.21",
            "v0.1.20",
            "v0.1.19",
            "v0.1.18",
            "v0.1.17",
            "v0.1.16",
            "v0.1.15",
            "v0.1.14",
            "v0.1.13",
            "v0.1.12",
            "v0.1.11",
            "v0.1.10",
            "v0.1.9",
            "v0.1.8",
            "v0.1.7",
            "v0.1.6",
            "v0.1.4",
            "v0.1.3",
            "v0.1.2",
            "v0.1.1",
            "v0.1.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-75625.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:29.727653716Z",
      "provider": "osv",
      "references": [
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/75xxx/CVE-2026-75625.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-75625",
        "https://www.vulncheck.com/advisories/kraken-agents-peer-to-peer-download-cache-poisoning-via-digest-verification-bypass",
        "https://github.com/uber/kraken/issues/638",
        "https://github.com/uber/kraken",
        "https://github.com/uber/kraken/blob/master/lib/torrent/storage/agentstorage/torrent.go"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-354"
        ],
        "cna_assigner": "VulnCheck",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/75xxx/CVE-2026-75625.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-75625",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 496777,
  "published_at": "2026-08-18T17:56:54.292+00:00"
}