Description
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.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| HAARG | HTTP::Tiny | < 0.093 | 0.093 |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | libhttp-tiny-perl | 0.092-2 | — |
| Debian 14 | perl | 5.40.1-8 | — |
| Debian 13 | libhttp-tiny-perl | 0.090-1+deb13u1 | — |
| Debian 13 | perl | 5.40.1-6+deb13u1 | — |
| Debian 12 | libhttp-tiny-perl | No fix yet | — |
| Debian 12 | perl | 5.36.0-7+deb12u4 | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.10 | libhttp-tiny-perl | No fix yet | — |
| Ubuntu 26.04 LTS | libhttp-tiny-perl | No fix yet | — |
| Ubuntu 25.10 | libhttp-tiny-perl | No fix yet | — |
| Ubuntu 24.04 LTS | libhttp-tiny-perl | No fix yet | — |
| Ubuntu 22.04 LTS | libhttp-tiny-perl | No fix yet | — |
Show 3 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 20.04 LTS | libhttp-tiny-perl | No fix yet | — |
| Ubuntu 18.04 LTS | libhttp-tiny-perl | No fix yet | — |
| Ubuntu 16.04 LTS | libhttp-tiny-perl | No fix yet | — |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | perl-HTTP-Tiny | 0.094-1.1 | openSUSE-SU-2026:10805-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | perl | 5.42.3-r0 | — |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2023 | perl-HTTP-Tiny +1 | 0.092-2.amzn2023.0.2 | ALAS2023-2026-1765 |
| Amazon Linux 2 | perl-HTTP-Tiny | 0.033-3.amzn2.0.2 | ALAS2-2026-3326 |
Azure Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Azure Linux 3 | perl | No fix yet | — |
Advisories 4
- SSA-457936 SSA-457936: Vulnerabilities in the additional GNU/Linux subsystem of the SIMATIC S7-1500 CPU 1518(F)-4 PN/DP MFP V3.1.7 Siemens ProductCERT · Nov 10, 2026
- ALAS2-2026-3326 Moderate: perl-HTTP-Tiny security update (Amazon Linux 2) Amazon Linux Security Center (ALAS) · Jun 8, 2026
- ALAS2023-2026-1765 Moderate: perl-HTTP-Tiny security update (Amazon Linux 2023) Amazon Linux Security Center (ALAS) · May 25, 2026
- openSUSE-SU-2026:10805-1 perl-HTTP-Tiny-0.094-1.1 on GA media SUSE / openSUSE Security Updates · May 19, 2026