@sveltejs/adapter-vercel · SvelteKit: Prerendered paths are interpreted as regular expressions in Vercel route config generated by
Affects @sveltejs/adapter-vercelSource GCVE Database
Not known to be exploited · CVSS 5.9 Medium : upgrade to 6.3.5 when convenient.
Data as of 13 Nov 2026, 21:20 UTC
Thin evidence
One scorer or none| CNA (GitHub_M) | CVSS 3.1 | 5.9 |
|---|
- Patch
- Available – fixed in 6.3.5, 4.0.1, 7.0.2 +1
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:NExploitation evidence
Disclosed: evidence found.
CVE published 13 Nov 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 13 Nov 2026.
What to do
Upgrade to a fixed release listed under Affected software.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| npm@sveltejs/adapter-vercel | Affected
| Fixed in
|
| npm@sveltejs/adapter-static | Affected
| Fixed in
|
| npm@sveltejs/adapter-vercel | Affected
| Fixed in
|
| npm@sveltejs/adapter-static | Affected
| Fixed in
|
Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.
AI-suggested
A patch is available and should be applied by upgrading to one of the fixed versions: 6.3.5, 4.0.1, 7.0.2, or 3.0.11. Users should update their @sveltejs/adapter-vercel dependency to a fixed version to remediate this vulnerability.
Description
A vulnerability in @sveltejs/adapter-vercel allows prerendered paths to be interpreted as regular expressions in the Vercel routing configuration. This occurs if an attacker can influence a link crawled during the prerender phase, potentially causing unintended regex interpretation. The issue affects multiple versions prior to fixed releases and has a medium severity with a CVSS score of 5.9.
References
- github.com/sveltejs/kit/security/advisories/GHSA-jf9x-2fg2-hx4w (opens in a new tab)
- github.com/sveltejs/kit/pull/17620 (opens in a new tab)
- github.com/sveltejs/kit/commit/0a2e58cbccdd46cac20aa5af4e2edf17e0da11dd (opens in a new tab)
- github.com/sveltejs/kit/commit/2ed61a6aa3ac230b89e3528654c587847d1525a0 (opens in a new tab)
- github.com/sveltejs/kit (opens in a new tab)
- github.com/sveltejs/kit/releases/tag/@sveltejs/adapter-static@3.0.11 (opens in a new tab)
- github.com/sveltejs/kit/releases/tag/@sveltejs/adapter-static@4.0.1 (opens in a new tab)
- github.com/sveltejs/kit/releases/tag/@sveltejs/adapter-vercel@6.3.5 (opens in a new tab)
- github.com/sveltejs/kit/releases/tag/@sveltejs/adapter-vercel@7.0.2 (opens in a new tab)