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Fencer Vulns
high 7.1

CVE-2026-7017 json

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

published 2026-07-07 4 mo ago modified 2026-10-25 14 d ago also EUVD-2026-42072

cvss
7.1
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.3%
EPSS 0.3% chance of exploitation in 30 days, percentile 28%
public exploits
0
none known

Summary

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.

Patch / fix

  • HAARG HTTP::Tiny 0.095
  • perl Debian 12 5.36.0-7+deb12u4
  • perl Debian 13 5.40.1-6+deb13u1
  • perl Debian 14 5.42.3-1
  • libhttp-tiny-perl Debian 13 0.090-1+deb13u1
  • libhttp-tiny-perl Debian 14 0.096-1

debian advisories DEBIAN-CVE-2026-7017

  • perl Ubuntu 24.04 LTS 5.38.2-3.2ubuntu0.4

ubuntu advisories UBUNTU-CVE-2026-7017

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • perl-HTTP-Tiny openSUSE Leap 16.0 0.096-bp160.1.1
  • perl-HTTP-Tiny openSUSE Tumbleweed 0.096-2.1

opensuse advisories openSUSE-SU-2026:21529-1openSUSE-SU-2026:11219-1

  • perl Alpine 3.24 5.42.3-r0

alpine advisories ALPINE-CVE-2026-7017

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

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-7017 updated cvss 6.5

HTTP::Tiny: HTTP::Tiny: Information disclosure via cross-origin redirect of credential headers

  • Red Hat All currently supported Red Hat products
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
4 mo ago

Exploit prediction

0.35% chance of exploitation in the next 30 days, higher than 28% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CISA ADP 3.1 7.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:N
CNA 3.1 7.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:N

Affected products

  • HAARG HTTP::Tiny

Classification

Weakness
  • CWE-522 Insufficiently Protected Credentials

References

Sources

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.