CVE-2026-8767

Description

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.

CVSS v3.1 Score

5.0

MEDIUM

CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L

EPSS — Exploit Prediction

0.0031

Probability of exploitation

0.54%

Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

Weakness Type (CWE)

CWE-77 CWE-77

CWE-78 OS Command Injection

Affected Products

Vendor	Product	Versions
vercel	ai	< 3.0.97

References

Exploits

https://gist.github.com/YLChen-007/870bd6966cd84703d91ce54dfea3bdd0

Other References

https://vuldb.com/submit/811402 https://vuldb.com/vuln/364392 https://vuldb.com/vuln/364392/cti

Frequently Asked Questions

What is 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. It has a CVSS v3.1 base score of 5.0 (MEDIUM).

How severe is CVE-2026-8767? +

CVE-2026-8767 has a CVSS v3.1 score of 5.0 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance. The EPSS score is 0.0031, placing it in the 1th percentile for exploitation probability.

What products are affected by CVE-2026-8767? +

CVE-2026-8767 affects products from vercel, specifically: ai. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2026-8767? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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