CVE-2017-16877 — ZEIT Next

ZEIT Next.js before 2.4.1 has directory traversal under the /_next and /static request namespace, allowing attackers to obtain sensitive information.

01What is this vulnerability?

ZEIT Next.js before 2.4.1 has directory traversal under the /_next and /static request namespace, allowing attackers to obtain sensitive information.

02Affected products

No structured affected-product list available — see references below for vendor advisories.

03Active exploitation status

Not currently listed on the CISA Known Exploited Vulnerabilities (KEV) catalog. EPSS is the best forward-looking signal — see the EPSS row above.

04Recommended remediation

• Patch to a fixed version listed in the vendor advisory (see references below).
• Mitigate with WAF rules, network egress filters, or feature flags where the patch is not yet available.
• Hunt historical logs for exploitation indicators — see Detection signatures below.

05Technical details

For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.

06Detection signatures

Ask SARA in chat to draft a starting detection for this CVE in your stack of choice.

07Related CVEs

No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.

08Timeline

• Published: 2017-11-17T17:29:00.337
• Last modified: 2026-05-13T00:24:29.033

09References

• github.com — https://github.com/vercel/next.js/commit/02fe7cf63f6265d73bdaf8bc50a4f2fb539dcd0…
• github.com — https://github.com/zeit/next.js/releases/tag/2.4.1
• github.com — https://github.com/vercel/next.js/commit/02fe7cf63f6265d73bdaf8bc50a4f2fb539dcd0…
• github.com — https://github.com/zeit/next.js/releases/tag/2.4.1