CVE-2026-107715Mechanize sends credential headers to another host after an HTTP redirect
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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The Mechanize library is used for automating interaction with websites. Prior to 2.14.1, Mechanize sends caller-supplied credential headers to a different host after an HTTP redirect. Mechanize#request_headers= is reapplied by Mechanize::HTTP::Agent#request_add_headers even after Mechanize::HTTP::Agent#response_redirect strips per-request headers, and the protected header lists omit Proxy-Authorization and Cookie2. An attacker who controls a redirect target can capture bearer tokens or session cookies supplied through request_headers= or the per-request headers argument, while Mechanize#cookie_jar and Mechanize::HTTP::AuthStore are not affected. This issue is fixed in version 2.14.1.
- CVSS
- 6.8 MEDIUM (v3.1, CNA)CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:N/A:N
- Weakness (CWE)
- CWE-200, CWE-522
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- GitHub_M
- NVD analysis
- Deferred
- Record last updated
- Oct 9, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
sparklemotion mechanize sparklemotion:mechanize (from the name) | before 2.15.0 | CNA record |
References
- https://github.com/sparklemotion/mechanize/security/advisories/GHSA-2mwr-xjcg-37j7x-refsource-confirm
- https://github.com/sparklemotion/mechanize/pull/676x-refsource-misc
- https://github.com/sparklemotion/mechanize/commit/02a1235842d6eda8d4a5a3d8f13aba2cecf52e4fx-refsource-misc
- https://github.com/sparklemotion/mechanize/commit/94e0902867296be804f36eccbb47acf7d5018745x-refsource-misc
- https://github.com/sparklemotion/mechanize/commit/ac49abf2869297d83c3b11bbfb8b18e63b588c95x-refsource-misc
- https://github.com/sparklemotion/mechanize/releases/tag/v2.14.1x-refsource-misc
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.