CVE Explorer
CVE-2026-1721
Summary
A Reflected Cross-Site Scripting (XSS) vulnerability was discovered in the AI Playground's OAuth callback handler. The `error_description` query parameter was directly interpolated into an HTML script tag without proper escaping, allowing attackers to execute arbitrary JavaScript in the context of the victim's session.
Root cause
The OAuth callback handler in `site/ai-playground/src/server.ts` directly interpolated the `authError` value, sourced from the `error_description` query p
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
0
Affected products and versions
1 source assertion{"collectionURL":"https://github.com/cloudflare","defaultStatus":"unaffected","packageName":"agents","repo":"https://github.com/cloudflare/agents","versions":[{"lessThan":"0.3.10","status":"affected","version":"0","versionType":"git"}]}
- cve_program_cvelist_v5affectedurn:baitaphish:normalized-source-record:v2:81d7e56556b47ac11cb6acc627eeb861e80ae61ae066f5f7858d0a04de5320a3 · sha256:3ec810813da7e951… · /containers/cna/affected/0
Provider-owned CVSS observations
1 source assertion{"metric":{"Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","Safety":"NOT_DEFINED","attackComplexity":"LOW","attackRequirements":"NONE","attackVector":"NETWORK","baseScore":6.2,"baseSeverity":"MEDIUM","exploitMaturity":"NOT_DEFINED","privilegesRequired":"NONE","providerUrgency":"NOT_DEFINED","subAvailabilityImpact":"NONE","subConfidentialityImpact":"HIGH","subIntegrityImpact":"LOW","userInteraction":"ACTIVE","valueDensity":"NOT_DEFINED","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:H/SI:L/SA:N","version":"4.0","vulnAvailabilityImpact":"NONE","vulnConfidentialityImpact…
- cve_program_cvelist_v5cvssurn:baitaphish:normalized-source-record:v2:81d7e56556b47ac11cb6acc627eeb861e80ae61ae066f5f7858d0a04de5320a3 · sha256:3ec810813da7e951… · /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_v5cweurn:baitaphish:normalized-source-record:v2:81d7e56556b47ac11cb6acc627eeb861e80ae61ae066f5f7858d0a04de5320a3 · sha256:3ec810813da7e951… · /containers/adp/0/problemTypes/0/descriptions/0
Source references
1 source assertion{"url":"https://github.com/cloudflare/agents/pull/841"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:81d7e56556b47ac11cb6acc627eeb861e80ae61ae066f5f7858d0a04de5320a3 · sha256:3ec810813da7e951… · /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.