RCE in Vercel Ai
CVE-2026-8767
A vulnerability has been found in vercel ai up to 3.0.97. Impacted is the function run of the file .github/workflows/prettier-on-automerge.yml of the component PR Branch Name Interpolation. The manipulation leads to os command injection. The attack can be initiated remotely. The complexity of an attack is rather high. The exploitability is considered difficult. The exploit has been disclosed to the public and may be used. The vendor was contacted early about this disclosure but did not respond in any way.
Vulnerability class: Command Injection (OS Command Injection)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.0 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L.
EPSS exploit prediction
EPSS: 0.070 (93.9th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 94th percentile — 93.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.043 · newest: 0.070 · change: +0.027
Affected products
- Vercel Ai — versions 3.0.0, 3.0.1, 3.0.2
Weakness classification (CWE)
References
- vuldb.com/vuln/364392 (technical-description, VDB Entry, Third Party Advisory, vdb-entry)
- vuldb.com/vuln/364392/cti (signature, Permissions Required, permissions-required, VDB Entry)
- vuldb.com/submit/811402 (VDB Entry, Third Party Advisory, third-party-advisory)
- gist.github.com/YLChen-007/870bd6966cd84703d91ce54dfea3bdd0 (Exploit, Third Party Advisory, exploit)
Frequently asked questions
- What is CVE-2026-8767?
- CVE-2026-8767 is a medium-severity vulnerability in Vercel Ai, classified under Command Injection. CVSS score: 5.0/10. Published 2026-05-17.
- How severe is CVE-2026-8767?
- Medium severity. CVSS v3 base score is 5.0 out of 10.