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CVE-2026-57516

Ray prior to 2.56.0 contains an unsafe deserialization vulnerability in the WebDataset reader that allows attackers to achieve remote code execution by supplying a malicious tar archive to the read_webdataset() function. The _default_decoder() function in webdataset_datasource.py unconditionally calls pickle.loads() on tar entries with .pkl/.pickle extensions and torch.load() with weights_only=False on .pt/.pth entries, executing arbitrary code inside Ray remote workers on every worker that proc
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:cbb3062a9d50d624a0d2232c1d10e052281298dfc687058cc9b12b976eb6ce73
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
1

Preserved source conflicts

No provider value was silently selected as the winner.

cvss · 2 assertions

{"metric":{"Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","Safety":"NOT_DEFINED","attackComplexity":"LOW","attackRequirements":"NONE","attackVector":"NETWORK","baseScore":8.6,"baseSeverity":"HIGH","exploitMaturity":"NOT_DEFINED","privilegesRequired":"NONE","providerUrgency":"NOT_DEFINED","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"ACTIVE","valueDensity":"NOT_DEFINED","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","version":"4.0","vulnAvailabilityImpact":"HIGH","vulnConfidentialityImpact"…

  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:44bf2c060b6a4fc77df95c1ef671715eef6a3d3b3bb25171581f6fe6fa7ef0bf · sha256:e773ee48c2dbdb29… · /containers/cna/metrics/0/cvssV4_0

{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":8.8,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"REQUIRED","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","version":"3.1"},"metric_type":"cvssV3_1"}

  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:44bf2c060b6a4fc77df95c1ef671715eef6a3d3b3bb25171581f6fe6fa7ef0bf · sha256:e773ee48c2dbdb29… · /containers/cna/metrics/1/cvssV3_1

Affected products and versions

1 source assertion
{"defaultStatus":"affected","packageURL":"pkg:github/ray-project/ray","product":"Ray","repo":"https://github.com/ray-project/ray","vendor":"Anyscale, Inc","versions":[{"lessThan":"2.56.0","status":"affected","version":"0","versionType":"semver"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:44bf2c060b6a4fc77df95c1ef671715eef6a3d3b3bb25171581f6fe6fa7ef0bf · sha256:e773ee48c2dbdb29… · /containers/cna/affected/0

Provider-owned CVSS observations

2 source assertions
{"metric":{"Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","Safety":"NOT_DEFINED","attackComplexity":"LOW","attackRequirements":"NONE","attackVector":"NETWORK","baseScore":8.6,"baseSeverity":"HIGH","exploitMaturity":"NOT_DEFINED","privilegesRequired":"NONE","providerUrgency":"NOT_DEFINED","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"ACTIVE","valueDensity":"NOT_DEFINED","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","version":"4.0","vulnAvailabilityImpact":"HIGH","vulnConfidentialityImpact"…
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:44bf2c060b6a4fc77df95c1ef671715eef6a3d3b3bb25171581f6fe6fa7ef0bf · sha256:e773ee48c2dbdb29… · /containers/cna/metrics/0/cvssV4_0
{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":8.8,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"REQUIRED","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:44bf2c060b6a4fc77df95c1ef671715eef6a3d3b3bb25171581f6fe6fa7ef0bf · sha256:e773ee48c2dbdb29… · /containers/cna/metrics/1/cvssV3_1

CWE assertions

1 source assertion
{"cweId":"CWE-502","description":"Deserialization of Untrusted Data","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:44bf2c060b6a4fc77df95c1ef671715eef6a3d3b3bb25171581f6fe6fa7ef0bf · sha256:e773ee48c2dbdb29… · /containers/cna/problemTypes/0/descriptions/0

Source references

6 source assertions
{"name":"Fix PR (1)","tags":["patch","issue-tracking"],"url":"https://github.com/ray-project/ray/pull/63469"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:44bf2c060b6a4fc77df95c1ef671715eef6a3d3b3bb25171581f6fe6fa7ef0bf · sha256:e773ee48c2dbdb29… · /containers/cna/references/2
{"name":"Fix PR (2)","tags":["patch","issue-tracking"],"url":"https://github.com/ray-project/ray/pull/63470"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:44bf2c060b6a4fc77df95c1ef671715eef6a3d3b3bb25171581f6fe6fa7ef0bf · sha256:e773ee48c2dbdb29… · /containers/cna/references/3
{"name":"Release Notes","tags":["release-notes"],"url":"https://github.com/ray-project/ray/releases/tag/ray-2.56.0"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:44bf2c060b6a4fc77df95c1ef671715eef6a3d3b3bb25171581f6fe6fa7ef0bf · sha256:e773ee48c2dbdb29… · /containers/cna/references/0
{"tags":["exploit"],"url":"https://github.com/ray-project/ray/security/advisories/GHSA-hhrp-gw25-jr43"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:44bf2c060b6a4fc77df95c1ef671715eef6a3d3b3bb25171581f6fe6fa7ef0bf · sha256:e773ee48c2dbdb29… · /containers/adp/0/references/0
{"name":"GitHub Security Advisory (GHSA-hhrp-gw25-jr43)","tags":["vendor-advisory"],"url":"https://github.com/ray-project/ray/security/advisories/GHSA-hhrp-gw25-jr43"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:44bf2c060b6a4fc77df95c1ef671715eef6a3d3b3bb25171581f6fe6fa7ef0bf · sha256:e773ee48c2dbdb29… · /containers/cna/references/1
{"tags":["third-party-advisory"],"url":"https://www.vulncheck.com/advisories/ray-unsafe-deserialization-rce-via-webdataset-reader"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:44bf2c060b6a4fc77df95c1ef671715eef6a3d3b3bb25171581f6fe6fa7ef0bf · sha256:e773ee48c2dbdb29… · /containers/cna/references/4

Attribution and limitations

  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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