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CVE-2026-42249

Ollama for Windows contains a Remote Code Execution vulnerability in its update mechanism due to improper handling of attacker‑controlled HTTP response headers. When downloading updates, the application constructs local file paths using values derived from HTTP headers without validation. These values are passed directly to filepath.Join, allowing path traversal sequences (../) to be resolved and enabling files to be written outside the intended update staging directory. An attacker who can infl
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:7d1114fc40124120b74914c489b79d0379f63b4f3e5b86f706484f778979b953
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
1

Preserved source conflicts

No provider value was silently selected as the winner.

cwe · 2 assertions

{"cweId":"CWE-22","description":"CWE-22 Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:21f39ed82b5cd9d506976a62e86a30f7e291931109699b6dfcd4f6f43f4dea1b · sha256:e3de2637ed5e0171… · /containers/cna/problemTypes/1/descriptions/0

{"cweId":"CWE-494","description":"CWE-494: Download of Code Without Integrity Check","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:21f39ed82b5cd9d506976a62e86a30f7e291931109699b6dfcd4f6f43f4dea1b · sha256:e3de2637ed5e0171… · /containers/cna/problemTypes/0/descriptions/0

Affected products and versions

1 source assertion
{"defaultStatus":"unknown","platforms":["Windows"],"product":"Ollama","repo":"https://github.com/ollama/ollama","vendor":"Ollama","versions":[{"lessThanOrEqual":"0.17.5","status":"affected","version":"0.12.10","versionType":"semver"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:21f39ed82b5cd9d506976a62e86a30f7e291931109699b6dfcd4f6f43f4dea1b · sha256:e3de2637ed5e0171… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","Safety":"NOT_DEFINED","attackComplexity":"HIGH","attackRequirements":"PRESENT","attackVector":"ADJACENT","baseScore":7.7,"baseSeverity":"HIGH","privilegesRequired":"NONE","providerUrgency":"NOT_DEFINED","subAvailabilityImpact":"LOW","subConfidentialityImpact":"LOW","subIntegrityImpact":"LOW","userInteraction":"NONE","valueDensity":"NOT_DEFINED","vectorString":"CVSS:4.0/AV:A/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:L/SI:L/SA:L","version":"4.0","vulnAvailabilityImpact":"HIGH","vulnConfidentialityImpact":"HIGH","vulnIntegrityImpact":"H…
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:21f39ed82b5cd9d506976a62e86a30f7e291931109699b6dfcd4f6f43f4dea1b · sha256:e3de2637ed5e0171… · /containers/cna/metrics/0/cvssV4_0

CWE assertions

2 source assertions
{"cweId":"CWE-22","description":"CWE-22 Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:21f39ed82b5cd9d506976a62e86a30f7e291931109699b6dfcd4f6f43f4dea1b · sha256:e3de2637ed5e0171… · /containers/cna/problemTypes/1/descriptions/0
{"cweId":"CWE-494","description":"CWE-494: Download of Code Without Integrity Check","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:21f39ed82b5cd9d506976a62e86a30f7e291931109699b6dfcd4f6f43f4dea1b · sha256:e3de2637ed5e0171… · /containers/cna/problemTypes/0/descriptions/0

Source references

2 source assertions
{"tags":["third-party-advisory"],"url":"https://cert.pl/en/posts/2026/04/CVE-2026-42248/"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:21f39ed82b5cd9d506976a62e86a30f7e291931109699b6dfcd4f6f43f4dea1b · sha256:e3de2637ed5e0171… · /containers/cna/references/0
{"tags":["product"],"url":"https://ollama.com/"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:21f39ed82b5cd9d506976a62e86a30f7e291931109699b6dfcd4f6f43f4dea1b · sha256:e3de2637ed5e0171… · /containers/cna/references/1

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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