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CVE-2026-58659

PyTorch Lightning through 2.6.5, fixed in commit d710d68, contains a remote code execution vulnerability in the _load_state function that imports and executes attacker-controlled module names from checkpoint _instantiator hyperparameters. Attackers can craft malicious checkpoint files that bypass weights_only=True protections to execute arbitrary code when LightningModule.load_from_checkpoint is called.
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:3c8310a644e7d166027eb6ab9763a3e669af7d5b27d815c36122544376273c6f
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":{"attackComplexity":"LOW","attackVector":"LOCAL","availabilityImpact":"HIGH","baseScore":7.8,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"REQUIRED","vectorString":"CVSS:3.1/AV:L/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:e3926e60f43c5e6ec864532f061cf97c73bbb18de340422fc6d33e55da5f5d92 · sha256:01953d938e9bc333… · /containers/cna/metrics/1/cvssV3_1

{"metric":{"Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","Safety":"NOT_DEFINED","attackComplexity":"LOW","attackRequirements":"NONE","attackVector":"LOCAL","baseScore":8.4,"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:L/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:e3926e60f43c5e6ec864532f061cf97c73bbb18de340422fc6d33e55da5f5d92 · sha256:01953d938e9bc333… · /containers/cna/metrics/0/cvssV4_0

Affected products and versions

1 source assertion
{"defaultStatus":"unaffected","packageURL":"pkg:pypi/assistant","product":"pytorch-lightning","repo":"https://github.com/Lightning-AI/pytorch-lightning","vendor":"Lightning-AI","versions":[{"lessThanOrEqual":"2.6.5","status":"affected","version":"0","versionType":"semver"},{"status":"unaffected","version":"d710d689510d50e800f53b3cd773cbca20b1f86f","versionType":"git"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:e3926e60f43c5e6ec864532f061cf97c73bbb18de340422fc6d33e55da5f5d92 · sha256:01953d938e9bc333… · /containers/cna/affected/0

Provider-owned CVSS observations

2 source assertions
{"metric":{"attackComplexity":"LOW","attackVector":"LOCAL","availabilityImpact":"HIGH","baseScore":7.8,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"REQUIRED","vectorString":"CVSS:3.1/AV:L/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:e3926e60f43c5e6ec864532f061cf97c73bbb18de340422fc6d33e55da5f5d92 · sha256:01953d938e9bc333… · /containers/cna/metrics/1/cvssV3_1
{"metric":{"Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","Safety":"NOT_DEFINED","attackComplexity":"LOW","attackRequirements":"NONE","attackVector":"LOCAL","baseScore":8.4,"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:L/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:e3926e60f43c5e6ec864532f061cf97c73bbb18de340422fc6d33e55da5f5d92 · sha256:01953d938e9bc333… · /containers/cna/metrics/0/cvssV4_0

CWE assertions

1 source assertion
{"cweId":"CWE-470","description":"Use of Externally-Controlled Input to Select Classes or Code ('Unsafe Reflection')","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:e3926e60f43c5e6ec864532f061cf97c73bbb18de340422fc6d33e55da5f5d92 · sha256:01953d938e9bc333… · /containers/cna/problemTypes/0/descriptions/0

Source references

4 source assertions
{"name":"Patch Commit","tags":["patch"],"url":"https://github.com/Lightning-AI/pytorch-lightning/commit/d710d689510d50e800f53b3cd773cbca20b1f86f"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:e3926e60f43c5e6ec864532f061cf97c73bbb18de340422fc6d33e55da5f5d92 · sha256:01953d938e9bc333… · /containers/cna/references/2
{"name":"Researcher Disclosure","tags":["technical-description","exploit"],"url":"https://github.com/Lightning-AI/pytorch-lightning/issues/21822"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:e3926e60f43c5e6ec864532f061cf97c73bbb18de340422fc6d33e55da5f5d92 · sha256:01953d938e9bc333… · /containers/cna/references/0
{"name":"Pull Request","tags":["issue-tracking"],"url":"https://github.com/Lightning-AI/pytorch-lightning/pull/21832"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:e3926e60f43c5e6ec864532f061cf97c73bbb18de340422fc6d33e55da5f5d92 · sha256:01953d938e9bc333… · /containers/cna/references/1
{"tags":["third-party-advisory"],"url":"https://www.vulncheck.com/advisories/pytorch-lightning-arbitrary-code-execution-via-instantiator-hyperparameter"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:e3926e60f43c5e6ec864532f061cf97c73bbb18de340422fc6d33e55da5f5d92 · sha256:01953d938e9bc333… · /containers/cna/references/3

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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