CVE catalog
CVE-2026-40562
Gazelle versions through 0.49 for Perl allows HTTP Request Smuggling via Improper Header Precedence. Gazelle incorrectly prioritizes "Content-Length" over "Transfer-Encoding: chunked" when both heade
- Severity
- High · CVSS 7.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N - Published
- Source
- [NVD] · [CVE record]
- EPSS
- 0.32% · Oct 25, 2026
Gazelle versions through 0.49 for Perl allows HTTP Request Smuggling via Improper Header Precedence. Gazelle incorrectly prioritizes "Content-Length" over "Transfer-Encoding: chunked" when both headers are present in an HTTP request. Per RFC 7230 3.3.3, Transfer-Encoding must take precedence. An attacker could exploit this to smuggle malicious HTTP requests via a front-end reverse proxy.
Vulnerable and fixed packages
Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.
| Distribution | Package | Release | Version | Status |
|---|---|---|---|---|
| Cpe | gazelle | Not reported | 0.50 | fixed |
| Cpe | gazelle | Not reported | 0.50 | fixed |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Cpe | gazelle | cpe | Not reported | 0.50 | Not reported | Not reported | Not reported |
| Cpe | gazelle | cpe | Not reported | 0.50 | Not reported | NVD-CVE-2026-40562 | Not reported |
OpenFactory catalog packages
No matching packages in this catalog.
Observed:
References
- [http://www.openwall.com/lists/oss-security/2026/05/06/7]
- [https://datatracker.ietf.org/doc/html/rfc7230#section-3.3.3]
- [https://metacpan.org/release/KAZEBURO/Gazelle-0.50/changes]
- [https://nvd.nist.gov/vuln/detail/CVE-2026-40562]
- [https://security.metacpan.org/patches/G/Gazelle/0.49/CVE-2026-40562-r1.patch]