VDB
CVE-2026-40560
CVE-2026-40560
PUBLISHED
Reported by CPANSec · Published April 28, 2026
Starman versions before 0.4018 for Perl allows HTTP Request Smuggling via Improper Header Precedence. Starman 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.
EPSS 0.49% · 41.9th percentile
Risk Scores
EPSS Score
0.49%
41.9th percentile
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| MIYAGAWA | Starman | 0 |
| MIYAGAWA | Starman | 0 |
Timeline
- CVE Published
- Apr 29, 2026 PoC Published
- Apr 29, 2026 PoC Published
- Apr 30, 2026 Security Advisory
- May 18, 2026 EPSS Score
- May 19, 2026 EPSS Score
- May 21, 2026 EPSS Score
- May 22, 2026 EPSS Score
- May 24, 2026 EPSS Score
- May 25, 2026 EPSS Score
- May 26, 2026 EPSS Score
- May 28, 2026 EPSS Score