CVE-2026-40561 · cross-distro fix matrix

CVE-2026-40561: 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 heade

Affects 2 Linux releases across 2 (distro × package) combinations. First disclosed: 2026-05-03.

CVSS v3:MEDIUM · 5.3(NVD-published)

Fix per ecosystem

Each block below is a distro release where CVE-2026-40561 has a known fix. Run the listed command on that distro to remediate.

Debian trixie

Source: Debian Security Tracker

starlet→ fixed in0.31-2+deb13u1urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y starlet
```

Alpine edge

Source: Alpine secdb

perl-starlet→ fixed in0.32-r0

apk update && apk add --upgrade perl-starlet

Are YOU affected by CVE-2026-40561?

5-second check on your actual server. Reads /etc/os-release, uname -r, and the distro's package manager; matches against this same cross-source index live.

curl https://mindsparkstack.com/scan.sh | bash

Form-based quickscan View on NVD

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