PT-2026-56232 · Haarg · Tiny-Http

Olaf Alders · Published 2026-07-07 · Updated 2026-07-07 · CVE-2026-7017

NVD

CVSS v3.1

7.1

High

Base vector

AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:N

HTTP::Tiny versions before 0.095 for Perl forward credential headers to cross-origin redirect targets.

When the server returns a 3xx redirect, maybe redirect follows the Location: header and prepare headers and cb re-merges the caller's headers argument into the new request, without checking whether the redirect target shares an origin with the original URL. Caller-supplied Authorization, Cookie and Proxy-Authorization headers are therefore re-sent to whatever host the redirect names, across scheme, host or port boundaries, and including https to http downgrades that expose them in plaintext on the wire.

The HTTP::Tiny POD note that "Authorization headers will not be included in a redirected request" applied only to the URL-userinfo Basic-auth path, not to headers passed explicitly by the caller.

Fix

Insufficiently Protected Credentials

Weakness Enumeration

CWE-522

Related Identifiers

CVE-2026-7017

Affected Products

Tiny-Http

References · 7

• https://github.com/Perl-Toolchain-Gang/HTTP-Tiny/commit/84984ef3930ddd4afcf5eb83b40d3cee200739c3.patch · Patch
• https://github.com/Perl-Toolchain-Gang/HTTP-Tiny/commit/e7a03aedf2395158f2b0d3bad2df943349227bb3.patch · Patch
• https://github.com/Perl-Toolchain-Gang/HTTP-Tiny/commit/8f32ca89e21c3ad0422adc698fa6ad17a193f55f.patch · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2026-7017 · Security Note
• https://github.com/Perl-Toolchain-Gang/HTTP-Tiny/pull/36 · Note
• http://openwall.com/lists/oss-security/2026/07/07/13 · Note
• https://metacpan.org/release/HAARG/HTTP-Tiny-0.095-TRIAL/changes · Note