@hapi/content: Regular Expression Denial of Service (ReDoS) in HTTP header parsing

Exploitation

No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.

CVSS 4.0

8.7 · CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N · score source

EPSS

• CVE-2026-115728: 0.47% estimated exploitation activity in the next 30 days; percentile 40.39 (FIRST EPSS, 2026-11-03). This is a model estimate, not proof of exploitation or customer exposure.
• CVE-2026-35213: 0.33% estimated exploitation activity in the next 30 days; percentile 25.94 (FIRST EPSS, 2026-11-03). This is a model estimate, not proof of exploitation or customer exposure.

As published by the source; long descriptions are shortened.

All versions of @hapi/content through 6.0.0 are vulnerable to Regular Expression Denial of Service (ReDoS) via crafted HTTP header values. Three regular expressions used to parse Content-Type and Content-Disposition headers contain patterns susceptible to catastrophic backtracking. This has been fixed in v6.0.1. Impact Denial of Service. An unauthenticated remote attacker can cause a Node.js process to become unresponsive by sending a single HTTP request with a maliciously crafted header value. Patches Fixed by tightening all three regular expressions to eliminate backtracking. Workarounds There are no known workarounds. Upgrade to the patched version.

Published by the source

4 Apr 2026, 04:23 UTC

Last modified by the source

24 Oct 2026, 02:55 UTC

Source last checked

26 Oct 2026, 12:48 UTC

1. Revision 3 · amended · 26 Oct 2026

   Amended from ghsa record GHSA-jg4p-7fhp-p32p

2. Revision 2 · amended · 24 Oct 2026

   Reviewed OSV alias/range/CVSS4 correction; package source scopes and original publication preserved. No customer finding resolved.

3. Revision 1 · created · 24 Oct 2026

   Published from osv record GHSA-jg4p-7fhp-p32p

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# Patch Next advisory brief: CVE-2026-115728

Advisory: @hapi/content: Regular Expression Denial of Service (ReDoS) in HTTP header parsing
IDs: CVE-2026-115728, GHSA-jg4p-7fhp-p32p
Record: https://patchnext.com/advisories/cve-2026-115728 (revision 3, source checked 26 Oct 2026, 12:48 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: High (CVSS 8.7)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor fix available; fixed versions by package: @hapi/content 6.0.1. A vendor fix does not mean a deployment is fixed.

## Affected components
- npm @hapi/content: affected <= 6.0.0; fixed in 6.0.1

## Suggested inspection (read-only)
- `npm ls @hapi/content --all`: lists every installed copy and version, including transitive ones. Run in the project root after `npm ci`.

## Supported action
Upgrade each affected component to a fixed version on its release line. For a transitive dependency, upgrade the parent package or add an override or constraint, then regenerate the lockfile. Redeploy every environment that ran an affected version.

## Required regression checks
- Run the test suite and a production build.
- Exercise the features that depend on @hapi/content.
- Repeat the inspection and confirm that only fixed versions remain installed.

## Rollback considerations
- Keep the previous lockfile and deployment artifact. Rolling back reinstates the vulnerable version, so apply any documented mitigation while you fix forward.

## Unresolved questions
- Which deployments run an affected version?
- Exploitation status can change. Check again before lowering the priority.
- Mark the work resolved only after the fixed version is verified in production.

## Sources
- Verified: https://osv.dev/vulnerability/GHSA-jg4p-7fhp-p32p (OSV record GHSA-jg4p-7fhp-p32p lists affected ranges: npm @hapi/content >=0 <6.0.1 (fixed))
- Verified: https://github.com/advisories/GHSA-jg4p-7fhp-p32p (GitHub-reviewed advisory GHSA-jg4p-7fhp-p32p lists affected ranges: npm @hapi/content >=0 <=6.0.0)

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