CVE-2026-35213: Regular Expression Denial of Service (ReDoS) in @hapi/content HTTP header parsing

Severity: high (CVSS 7.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-04-06 · updated 2026-07-24
Weakness: CWE-1333

Description

@hapi/content provided HTTP Content-* headers parsing. 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 vulnerability is fixed in 6.0.1.

Affected products

hapijs content: before 6.0.1 — fixed in 6.0.1

How to fix

Upgrade to a fixed version: hapijs content 6.0.1. Check the vendor advisory for mitigations.

References

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