CVE Explorer

CVE-2026-39399

NuGet Gallery is a package repository that powers nuget.org. A security vulnerability exists in the NuGetGallery backend job’s handling of .nuspec files within NuGet packages. An attacker can supply a crafted nuspec file with malicious metadata, leading to cross package metadata injection that may result in remote code execution (RCE) and/or arbitrary blob writes due to insufficient input validation. The issue is exploitable via URI fragment injection using unsanitized package identifiers, allow

Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:2147eec0df210a24eb37e93dfd9cda88700a6804f0a7a342675581069ae9cd1f

Known exploited

Not asserted

Disputed

Stale source

Conflicts

Preserved source conflicts

No provider value was silently selected as the winner.

cwe · 2 assertions

{"cweId":"CWE-20","description":"CWE-20: Improper Input Validation","lang":"en","type":"CWE"}

cve_program_cvelist_v5cwe
urn:baitaphish:normalized-source-record:v2:fe51a8fd79008b01502d24b9402a6545b2b1d01c9640d204d35d0411095abaca · sha256:7991a53f308b540d… · /containers/cna/problemTypes/0/descriptions/0

{"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:fe51a8fd79008b01502d24b9402a6545b2b1d01c9640d204d35d0411095abaca · sha256:7991a53f308b540d… · /containers/cna/problemTypes/1/descriptions/0

Affected products and versions

1 source assertion

{"product":"NuGetGallery","vendor":"NuGet","versions":[{"status":"affected","version":"< 0e80f87628349207cdcaf55358491f8a6f1ca276"}]}

cve_program_cvelist_v5affected
urn:baitaphish:normalized-source-record:v2:fe51a8fd79008b01502d24b9402a6545b2b1d01c9640d204d35d0411095abaca · sha256:7991a53f308b540d… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion

{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":9.6,"baseSeverity":"CRITICAL","confidentialityImpact":"NONE","integrityImpact":"HIGH","privilegesRequired":"LOW","scope":"CHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:H","version":"3.1"},"metric_type":"cvssV3_1"}

cve_program_cvelist_v5cvss
urn:baitaphish:normalized-source-record:v2:fe51a8fd79008b01502d24b9402a6545b2b1d01c9640d204d35d0411095abaca · sha256:7991a53f308b540d… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

2 source assertions

{"cweId":"CWE-20","description":"CWE-20: Improper Input Validation","lang":"en","type":"CWE"}

cve_program_cvelist_v5cwe
urn:baitaphish:normalized-source-record:v2:fe51a8fd79008b01502d24b9402a6545b2b1d01c9640d204d35d0411095abaca · sha256:7991a53f308b540d… · /containers/cna/problemTypes/0/descriptions/0

{"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:fe51a8fd79008b01502d24b9402a6545b2b1d01c9640d204d35d0411095abaca · sha256:7991a53f308b540d… · /containers/cna/problemTypes/1/descriptions/0

Source references

2 source assertions

{"name":"https://github.com/NuGet/NuGetGallery/commit/0e80f87628349207cdcaf55358491f8a6f1ca276","tags":["x_refsource_MISC"],"url":"https://github.com/NuGet/NuGetGallery/commit/0e80f87628349207cdcaf55358491f8a6f1ca276"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:fe51a8fd79008b01502d24b9402a6545b2b1d01c9640d204d35d0411095abaca · sha256:7991a53f308b540d… · /containers/cna/references/1

{"name":"https://github.com/NuGet/NuGetGallery/security/advisories/GHSA-9r3h-v4hx-rhfr","tags":["x_refsource_CONFIRM"],"url":"https://github.com/NuGet/NuGetGallery/security/advisories/GHSA-9r3h-v4hx-rhfr"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:fe51a8fd79008b01502d24b9402a6545b2b1d01c9640d204d35d0411095abaca · sha256:7991a53f308b540d… · /containers/cna/references/0

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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