GHSA-ggv3-7p47-pfv8

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Source
https://github.com/advisories/GHSA-ggv3-7p47-pfv8
Import Source
https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/03/GHSA-ggv3-7p47-pfv8/GHSA-ggv3-7p47-pfv8.json
JSON Data
https://api.osv.dev/v1/vulns/GHSA-ggv3-7p47-pfv8
Aliases
Related
Published
2026-03-17T16:17:15Z
Modified
2026-03-19T17:59:01.302251Z
Severity
  • 6.3 (Medium) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N CVSS Calculator
Summary
Next.js: HTTP request smuggling in rewrites
Details

Summary

When Next.js rewrites proxy traffic to an external backend, a crafted DELETE/OPTIONS request using Transfer-Encoding: chunked could trigger request boundary disagreement between the proxy and backend. This could allow request smuggling through rewritten routes.

Impact

An attacker could smuggle a second request to unintended backend routes (for example, internal/admin endpoints), bypassing assumptions that only the configured rewrite destination/path is reachable. This does not impact applications hosted on providers that handle rewrites at the CDN level, such as Vercel.

Patches

The vulnerability originated in an upstream library vendored by Next.js. It is fixed by updating that dependency’s behavior so content-length: 0 is added only when both content-length and transfer-encoding are absent, and transfer-encoding is no longer removed in that code path.

Workarounds

If upgrade is not immediately possible: - Block chunked DELETE/OPTIONS requests on rewritten routes at your edge/proxy. - Enforce authentication/authorization on backend routes per our security guidance.

Database specific 
{
    "cwe_ids": [
        "CWE-444"
    ],
    "github_reviewed": true,
    "nvd_published_at": "2026-03-18T01:16:05Z",
    "severity": "MODERATE",
    "github_reviewed_at": "2026-03-17T16:17:15Z"
}
References

Affected packages

npm / next

Package

Name
next
View open source insights on deps.dev
Purl
pkg:npm/next

Affected ranges

Type
SEMVER
Events
Introduced
16.0.0-beta.0
Fixed
16.1.7

Database specific

source 
"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/03/GHSA-ggv3-7p47-pfv8/GHSA-ggv3-7p47-pfv8.json"

npm / next

Package

Name
next
View open source insights on deps.dev
Purl
pkg:npm/next

Affected ranges

Type
SEMVER
Events
Introduced
9.5.0
Fixed
15.5.13

Database specific

source 
"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/03/GHSA-ggv3-7p47-pfv8/GHSA-ggv3-7p47-pfv8.json"