CVE Explorer

CVE-2026-22864

Deno is a JavaScript, TypeScript, and WebAssembly runtime. Before 2.5.6, a prior patch aimed to block spawning Windows batch/shell files by returning an error when a spawned path’s extension matched .bat or .cmd. That check performs a case-sensitive comparison against lowercase literals and therefore can be bypassed when the extension uses alternate casing (for example .BAT, .Bat, etc.). This vulnerability is fixed in 2.5.6.

Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:bb6dadb1e61f07450d1c195d0b998c9baa63d75edbe985f310495819ad5756dc

Known exploited

Not asserted

Disputed

Stale source

Conflicts

Affected products and versions

1 source assertion

{"product":"deno","vendor":"denoland","versions":[{"status":"affected","version":"< 2.5.6"}]}

cve_program_cvelist_v5affected
urn:baitaphish:normalized-source-record:v2:c51419728610b5391584f66352c5e7a704cb2b01c48da8654148c634062259a9 · sha256:83ff98839627ba42… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion

{"metric":{"attackComplexity":"HIGH","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":8.1,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/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:c51419728610b5391584f66352c5e7a704cb2b01c48da8654148c634062259a9 · sha256:83ff98839627ba42… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

1 source assertion

{"cweId":"CWE-77","description":"CWE-77: Improper Neutralization of Special Elements used in a Command ('Command Injection')","lang":"en","type":"CWE"}

cve_program_cvelist_v5cwe
urn:baitaphish:normalized-source-record:v2:c51419728610b5391584f66352c5e7a704cb2b01c48da8654148c634062259a9 · sha256:83ff98839627ba42… · /containers/cna/problemTypes/0/descriptions/0

Source references

2 source assertions

{"name":"https://github.com/denoland/deno/releases/tag/v2.5.6","tags":["x_refsource_MISC"],"url":"https://github.com/denoland/deno/releases/tag/v2.5.6"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:c51419728610b5391584f66352c5e7a704cb2b01c48da8654148c634062259a9 · sha256:83ff98839627ba42… · /containers/cna/references/1

{"name":"https://github.com/denoland/deno/security/advisories/GHSA-m3c4-prhw-mrx6","tags":["x_refsource_CONFIRM"],"url":"https://github.com/denoland/deno/security/advisories/GHSA-m3c4-prhw-mrx6"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:c51419728610b5391584f66352c5e7a704cb2b01c48da8654148c634062259a9 · sha256:83ff98839627ba42… · /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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