CVE-2026-96759 Orval - Stored XSS

Orval < 8.29.0 contains a stored XSS caused by failure to escape the operationId parameter in generated TanStack Query mutator options metadata, letting attackers inject and execute arbitrary JavaScript code when hooks are called, exploit requires crafted OpenAPI specification.

CVSS base score 9.8 /10
Critical
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
EPSS
0.43% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Stored XSS
Impact
Client Script Exec
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Published
23 September 2026
Updated
15 October 2026
Weakness
CWE-94

Vendor fix

Update to version 8.29.0 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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