Dashboard / CVE-2026-40561

CVE-2026-40561

MEDIUM
MEDIUM Priority: 0.02 BB Relevance: 71/100
Published: 2026-05-03 Modified: 2026-10-26 First seen: 2026-10-29 Status: active

Attack Surface

Network Low Complexity No Auth No Interaction

CVSS Vector Breakdown

AV: Network
AC: Low
PR: None
UI: None
S: Unchanged
C: None
I: Low
A: None

Description

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.

Weakness Classification (1)

Affected Software (1)

VendorProductVersion
kazuho starlet < 0.31

References & Advisories (4)

Bug Bounty Relevance

71 / 100
✓ Network accessible
✓ No authentication
✓ Low complexity
✓ No user interaction

CVSS Score

5.3 / 10.0 v3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

EPSS — Exploitation Probability

0.36%
Raw Score 0.003640
Percentile 30.1%
Date 2026-10-29

EPSS Trend

2026-10-29
0.00364
2026-10-28
0.00364

Intelligence Sources

nvd ref →

External Links