CVE Explorer
CVE-2026-4983
Open VSX Registry does not sanitize SVG files uploaded as extension icons prior to storage, and serves them with Content-Type: image/svg+xml without security headers such as Content-Security-Policy or Content-Disposition: attachment. This allows an attacker to publish an extension with a malicious SVG icon and achieve stored cross-site scripting (XSS) when a user navigates directly to the icon URL.
On deployments using local storage, script execution occurs within the Open VSX application or
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
0
Affected products and versions
1 source assertion{"defaultStatus":"unaffected","product":"Eclipse Open VSX","repo":"https://github.com/eclipse-openvsx/openvsx","vendor":"Eclipse Foundation","versions":[{"lessThan":"0.34.1","status":"affected","version":"0.1.0","versionType":"semver"}]}
- cve_program_cvelist_v5affectedurn:baitaphish:normalized-source-record:v2:bc71347b91a8b2f105291db0bf029f72c5da08ca490de413256ff8b37ecda8da · sha256:3cfb04ea12df7201… · /containers/cna/affected/0
Provider-owned CVSS observations
1 source assertion{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":4.1,"baseSeverity":"MEDIUM","confidentialityImpact":"NONE","integrityImpact":"LOW","privilegesRequired":"LOW","scope":"CHANGED","userInteraction":"REQUIRED","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:N/I:L/A:N","version":"3.1"},"metric_type":"cvssV3_1"}
- cve_program_cvelist_v5cvssurn:baitaphish:normalized-source-record:v2:bc71347b91a8b2f105291db0bf029f72c5da08ca490de413256ff8b37ecda8da · sha256:3cfb04ea12df7201… · /containers/cna/metrics/0/cvssV3_1
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_v5cweurn:baitaphish:normalized-source-record:v2:bc71347b91a8b2f105291db0bf029f72c5da08ca490de413256ff8b37ecda8da · sha256:3cfb04ea12df7201… · /containers/cna/problemTypes/0/descriptions/0
Source references
1 source assertion{"url":"https://gitlab.eclipse.org/security/cve-assignment/-/work_items/91"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:bc71347b91a8b2f105291db0bf029f72c5da08ca490de413256ff8b37ecda8da · sha256:3cfb04ea12df7201… · /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.