CVE-2026-8769: vercel ai provider-utils response-handler.ts createJsonErrorResponseHandler resource consumption

Severity: medium (CVSS 6.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.6% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2026-05-17 · updated 2026-10-14
Weakness: CWE-400

Description

A vulnerability was determined in vercel ai up to 3.0.97. The impacted element is the function createJsonResponseHandler/createJsonErrorResponseHandler of the file packages/provider-utils/src/response-handler.ts of the component provider-utils. This manipulation causes resource consumption. The attack may be initiated remotely. The exploit has been publicly disclosed and may be utilized. The vendor was contacted early about this disclosure but did not respond in any way.

Affected products

vercel ai: through 3.0.97

References

https://gist.github.com/YLChen-007/fb1096bc8428bed9a428f764d9d103bb
https://vuldb.com/submit/811406
https://vuldb.com/vuln/364394
https://vuldb.com/vuln/364394/cti

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