HTTP::Tiny versions before 0.093 for Perl do not validate CRLF in HTTP request lines or control field header values

published 2026-05-11 5 mo ago modified 2026-10-26 13 d ago also EUVD-2026-29344

cvss: 6.5; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.2%; EPSS 0.2% chance of exploitation in 30 days, percentile 13%
public exploits: 0; none known

HTTP::Tiny versions before 0.093 for Perl do not validate CRLF in HTTP request lines or control field header values.

The unvalidated inputs are the method and URI in the request line, the URL host that becomes the `Host:` header, and HTTP/1.1 control data field values.

An attacker who controls one of these inputs, for example a user supplied URL passed to a webhook or URL fetch endpoint, can inject additional headers and smuggle requests to the upstream server.

Patch / fix

fixed in 1 distros 3 links 1

HAARG HTTP::Tiny 0.093

debian opensuse alpine

perl Debian 12 5.36.0-7+deb12u4
perl Debian 13 5.40.1-6+deb13u1
perl Debian 14 5.40.1-8
libhttp-tiny-perl Debian 13 0.090-1+deb13u1
libhttp-tiny-perl Debian 14 0.092-2

debian advisories DEBIAN-CVE-2026-7010

perl-HTTP-Tiny openSUSE Tumbleweed 0.094-1.1

opensuse advisories openSUSE-SU-2026:10805-1

perl Alpine 3.24 5.42.3-r0

alpine advisories ALPINE-CVE-2026-7010

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

github.com/Perl-Toolchain-Gang/HTTP-Tiny@d73c765 commit

CISA SSVC

Exploitation: none
Automatable: yes
Technical impact: partial
Assessed: 5 mo ago (2026-05-12)

Exploit prediction

0.23% chance of exploitation in the next 30 days, higher than 13% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CISA ADP	3.1	6.5	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
CNA	3.1	6.5	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

Affected products

HAARG HTTP::Tiny

Classification

Weakness

CWE-113 Improper Neutralization of CRLF Sequences in HTTP Headers

References

Sources

CVE List CVE-2026-7010
NVD CVE-2026-7010

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary