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.

CVSS v3 9.0 CRITICAL

9.0^/10

CVSS v3 : CRITICAL

Vector :

Exploitability : 2.2 / Impact : 6.0

Attack Vector NETWORK

Attack Complexity HIGH

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope CHANGED

References

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

Configurations

No configuration.

History

22 Oct 2026, 22:10

Type	Values Removed	Values Added
Summary		(es) Los agentes de Kraken no verifican los blobs descargados de igual a igual contra su resumen SHA-256 solicitado antes de confirmarlos en la caché direccionable por contenido, confiando únicamente en sumas de verificación CRC32 para la validación de piezas. Los atacantes en la ruta de agente a agente o los pares maliciosos pueden suministrar contenido sustituido con correcciones CRC32 falsificadas que pasan las verificaciones por pieza, envenenando la caché con capas de imagen de contenedor o manifiestos elegidos por el atacante que son resembrados y ejecutados por otros hosts.

Information

Published : 2026-08-18 18:19

Updated : 2026-10-22 22:10

NVD link : CVE-2026-75625

Mitre link : CVE-2026-75625

CVE.ORG link : CVE-2026-75625

JSON object : View

Products Affected

No product.

CWE

CWE-354

Improper Validation of Integrity Check Value

{"id": "CVE-2026-75625", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-75625", "role": "CISA Coordinator", "options": [{"exploitation": "poc"}, {"automatable": "no"}, {"technicalImpact": "total"}], "version": "2.0.3", "timestamp": "2026-08-18T19:06:07.620370Z"}}], "cvssMetricV31": [{"type": "Secondary", "source": "disclosure@vulncheck.com", "cvssData": {"scope": "CHANGED", "version": "3.1", "baseScore": 9.0, "attackVector": "NETWORK", "baseSeverity": "CRITICAL", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "HIGH", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}, "impactScore": 6.0, "exploitabilityScore": 2.2}], "cvssMetricV40": [{"type": "Secondary", "source": "disclosure@vulncheck.com", "cvssData": {"Safety": "NOT_DEFINED", "version": "4.0", "Recovery": "NOT_DEFINED", "baseScore": 9.1, "Automatable": "NOT_DEFINED", "attackVector": "NETWORK", "baseSeverity": "CRITICAL", "valueDensity": "NOT_DEFINED", "vectorString": "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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X", "exploitMaturity": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED", "userInteraction": "NONE", "attackComplexity": "LOW", "attackRequirements": "PRESENT", "privilegesRequired": "NONE", "subIntegrityImpact": "HIGH", "vulnIntegrityImpact": "HIGH", "integrityRequirement": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "subAvailabilityImpact": "HIGH", "vulnAvailabilityImpact": "NONE", "availabilityRequirement": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "subConfidentialityImpact": "HIGH", "vulnConfidentialityImpact": "NONE", "confidentialityRequirement": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED"}}]}, "affected": [{"source": "disclosure@vulncheck.com", "affectedData": [{"repo": "https://github.com/uber/kraken", "vendor": "uber", "product": "kraken", "versions": [{"status": "affected", "version": "0", "versionType": "custom", "lessThanOrEqual": "0.1.27"}], "packageURL": "pkg:golang/github.com/uber/kraken", "defaultStatus": "unaffected"}]}], "published": "2026-08-18T18:19:34.343", "references": [{"url": "https://github.com/uber/kraken", "source": "disclosure@vulncheck.com"}, {"url": "https://github.com/uber/kraken/blob/master/lib/torrent/storage/agentstorage/torrent.go", "source": "disclosure@vulncheck.com"}, {"url": "https://github.com/uber/kraken/issues/638", "source": "disclosure@vulncheck.com"}, {"url": "https://www.vulncheck.com/advisories/kraken-agents-peer-to-peer-download-cache-poisoning-via-digest-verification-bypass", "source": "disclosure@vulncheck.com"}, {"url": "https://github.com/uber/kraken/issues/638", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"}], "vulnStatus": "Deferred", "weaknesses": [{"type": "Secondary", "source": "disclosure@vulncheck.com", "description": [{"lang": "en", "value": "CWE-354"}]}], "descriptions": [{"lang": "en", "value": "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."}, {"lang": "es", "value": "Los agentes de Kraken no verifican los blobs descargados de igual a igual contra su resumen SHA-256 solicitado antes de confirmarlos en la cach\u00e9 direccionable por contenido, confiando \u00fanicamente en sumas de verificaci\u00f3n CRC32 para la validaci\u00f3n de piezas. Los atacantes en la ruta de agente a agente o los pares maliciosos pueden suministrar contenido sustituido con correcciones CRC32 falsificadas que pasan las verificaciones por pieza, envenenando la cach\u00e9 con capas de imagen de contenedor o manifiestos elegidos por el atacante que son resembrados y ejecutados por otros hosts."}], "lastModified": "2026-10-22T22:10:00.250", "sourceIdentifier": "disclosure@vulncheck.com"}