CVE-2026-107714CWE-200CWE-319CWE-522information-disclosure

CVE-2026-107714

Medium · published October 9, 2026

CVSS v3.1
5.9
EPSS
0%
Percentile
12.9
In the wild
Unconfirmed
What it is

The Mechanize library is used for automating interaction with websites. Prior to 2.14.1, Mechanize::HTTP::Agent#response_redirect treats redirects as same-origin when the host matches without consistently comparing scheme and port. A same-host HTTPS-to-HTTP redirect can send Authorization and Cookie headers over cleartext, while a same-host redirect to another port can send a caller-supplied Cookie header to a different service. Cookies in Mechanize#cookie_jar remain scoped separately; the issue affects caller-supplied headers and can disclose credentials without affecting integrity or availability. This issue is fixed in version 2.14.1.

The record
Technical detail
CVSS v3.1
5.9 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
CVSS v4.0
Not supplied
EPSS
0.00228 · 12.9th percentile
Weaknesses
CWE-200 · Exposure of Sensitive Information to an Unauthorized Actor; CWE-319 · Cleartext Transmission of Sensitive Information; CWE-522 · Insufficiently Protected Credentials
Published
2026-10-09T02:17Z
References (5)
https://github.com/sparklemotion/mechanize/commit/02a1235842d6eda8d4a5a3d8f13aba2cecf52e4f · [email protected]https://github.com/sparklemotion/mechanize/commit/2f97fe358a91928e5e48221f2ec5cb50fa1a43ba · [email protected]https://github.com/sparklemotion/mechanize/pull/676 · [email protected]https://github.com/sparklemotion/mechanize/releases/tag/v2.14.1 · [email protected]https://github.com/sparklemotion/mechanize/security/advisories/GHSA-5jgv-wc2m-xv99 · [email protected]
EPSS history
Timeline
  • 10 OCT 03:27Z
    EPSS moved — → 0%
    epss
  • 08 OCT 21:26Z
    Mechanize sends credential headers to a different scheme or port after a redirect
    cvelistv5
  • 08 OCT 21:26Z
    Mechanize sends credential headers to a different scheme or port after a redirect
    cvelistv5