CVE Explorer

CVE-2026-2266

An improper neutralization of input vulnerability was identified in GitHub Enterprise Server that allowed DOM-based cross-site scripting via task list content. The task list content extraction logic did not properly re-encode browser-decoded text nodes before rendering, allowing user-supplied HTML to be injected into the page. An authenticated attacker could craft malicious task list items in issues or pull requests to execute arbitrary scripts in the context of another user's browser session. T

Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:0fef85e64a72921a8f2a9ce10440c570eb2126941515d11afe8cb383d4578fc3

Known exploited

Not asserted

Disputed

Stale source

Conflicts

Affected products and versions

1 source assertion

{"defaultStatus":"unaffected","product":"Enterprise Server","vendor":"GitHub","versions":[{"changes":[{"at":"3.18.6","status":"unaffected"}],"lessThanOrEqual":"3.18.5","status":"affected","version":"3.18.0","versionType":"semver"},{"changes":[{"at":"3.19.3","status":"unaffected"}],"lessThanOrEqual":"3.19.2","status":"affected","version":"3.19.0","versionType":"semver"}]}

cve_program_cvelist_v5affected
urn:baitaphish:normalized-source-record:v2:983c39d511542d0afb0a992dc41c076acf72b14af38f06862606746baf72fe00 · sha256:7bcfddd0fd8820e4… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion

{"metric":{"Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","Safety":"NOT_DEFINED","attackComplexity":"LOW","attackRequirements":"PRESENT","attackVector":"NETWORK","baseScore":7.4,"baseSeverity":"HIGH","exploitMaturity":"NOT_DEFINED","privilegesRequired":"LOW","providerUrgency":"NOT_DEFINED","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"PASSIVE","valueDensity":"NOT_DEFINED","vectorString":"CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:P/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N","version":"4.0","vulnAvailabilityImpact":"NONE","vulnConfidentialityImpa…

cve_program_cvelist_v5cvss
urn:baitaphish:normalized-source-record:v2:983c39d511542d0afb0a992dc41c076acf72b14af38f06862606746baf72fe00 · sha256:7bcfddd0fd8820e4… · /containers/cna/metrics/0/cvssV4_0

CWE assertions

1 source assertion

{"cweId":"CWE-79","description":"CWE-79 Improper neutralization of input during web page generation ('cross-site scripting')","lang":"en","type":"CWE"}

cve_program_cvelist_v5cwe
urn:baitaphish:normalized-source-record:v2:983c39d511542d0afb0a992dc41c076acf72b14af38f06862606746baf72fe00 · sha256:7bcfddd0fd8820e4… · /containers/cna/problemTypes/0/descriptions/0

Source references

2 source assertions

{"tags":["release-notes"],"url":"https://docs.github.com/en/enterprise-server@3.18/admin/release-notes#3.18.6"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:983c39d511542d0afb0a992dc41c076acf72b14af38f06862606746baf72fe00 · sha256:7bcfddd0fd8820e4… · /containers/cna/references/0

{"tags":["release-notes"],"url":"https://docs.github.com/en/enterprise-server@3.19/admin/release-notes#3.19.3"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:983c39d511542d0afb0a992dc41c076acf72b14af38f06862606746baf72fe00 · sha256:7bcfddd0fd8820e4… · /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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