CVE-2026-40561
Starlet versions through 0.31 for Perl allows HTTP Request Smuggling via Improper Header Precedence
CVSS Score
0.0
EPSS Score
0.0%
EPSS Percentile
0th
Starlet versions through 0.31 for Perl allows HTTP Request Smuggling via Improper Header Precedence. Starlet 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.
| CWE | CWE-444 |
| Vendor | kazuho |
| Product | starlet |
| Published | May 3, 2026 |
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Affected Versions
KAZUHO / Starlet
0 ≤ 0.31
References
Credits
CPANSec