CVE-2022-31033
Authorization header leak in rubygem Mechanize
The Mechanize library is used for automating interaction with websites. Mechanize automatically stores and sends cookies, follows redirects, and can follow links and submit forms. In versions prior to 2.8.5 the Authorization header is leaked after a redirect to a different port on the same site. Users are advised to upgrade to Mechanize v2.8.5 or later. There are no known workarounds for this issue.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- High
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- None
- Availability
- None
Exploit likelihood
What each source reports
CVE List Score used
Authorization header leak in rubygem Mechanize
The Mechanize library is used for automating interaction with websites. Mechanize automatically stores and sends cookies, follows redirects, and can follow links and submit forms. In versions prior to 2.8.5 the Authorization header is leaked after a redirect to a different port on the same site. Users are advised to upgrade to Mechanize v2.8.5 or later. There are no known workarounds for this issue.
- Record
CVE-2022-31033- CVSS 3.1
- 5.9 Medium
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N - Weakness
- CWE-200
- Updated
- 2026-11-02
EUVDEUVD-2022-5951
The Mechanize library is used for automating interaction with websites. Mechanize automatically stores and sends cookies, follows redirects, and can follow links and submit forms. In versions prior to 2.8.5 the Authorization header is leaked after a redirect to a different port on the same site. Users are advised to upgrade to Mechanize v2.8.5 or later. There are no known workarounds for this issue.
- Record
EUVD-2022-5951- CVSS 3.1
- 5.9 Medium
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N - Updated
- 2026-11-02
GitHub AdvisoriesGHSA-64qm-hrgp-pgr9
Mechanize before v2.8.5 vulnerable to authorization header leak on port redirect
Summary
Mechanize (rubygem) < v2.8.5 leaks the Authorization header after a redirect to a different port on the same site.
Mitigation
Upgrade to Mechanize v2.8.5 or later.
Notes
See https://curl.se/docs/CVE-2022-27776.html for a similar vulnerability in curl.
Cookies are shared with a server at a different port on the same site, per https://datatracker.ietf.org/doc/html/rfc6265#section-8.5 which states in part:
Cookies do not provide isolation by port. If a cookie is readable by a service running on one port, the cookie is also readable by a service running on another port of the same server. If a cookie is writable by a service on one port, the cookie is also writable by a service running on another port of the same server. For this reason, servers SHOULD NOT both run mutually distrusting services on different ports of the same host and use cookies to store security- sensitive information.
- Record
GHSA-64qm-hrgp-pgr9- CVSS 3.1
- 5.9 Medium
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N - Weakness
- CWE-200, CWE-522
- Updated
- 2026-11-02
NVD
The Mechanize library is used for automating interaction with websites. Mechanize automatically stores and sends cookies, follows redirects, and can follow links and submit forms. In versions prior to 2.8.5 the Authorization header is leaked after a redirect to a different port on the same site. Users are advised to upgrade to Mechanize v2.8.5 or later. There are no known workarounds for this issue.
- Record
CVE-2022-31033- CVSS 3.1
- 5.9 Medium
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N - CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N - CVSS 2.0
- 5.0 Medium
AV:N/AC:L/Au:N/C:P/I:N/A:N - Weakness
- CWE-200
- Updated
- 2026-11-02
OSV
Authorization header leak in rubygem Mechanize
The Mechanize library is used for automating interaction with websites. Mechanize automatically stores and sends cookies, follows redirects, and can follow links and submit forms. In versions prior to 2.8.5 the Authorization header is leaked after a redirect to a different port on the same site. Users are advised to upgrade to Mechanize v2.8.5 or later. There are no known workarounds for this issue.
- Record
CVE-2022-31033- CVSS 3.1
- 5.9 Medium
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N - Weakness
- CWE-200
- Updated
- 2026-11-02
OSVGHSA-64qm-hrgp-pgr9
Mechanize before v2.8.5 vulnerable to authorization header leak on port redirect
Summary
Mechanize (rubygem) < v2.8.5 leaks the Authorization header after a redirect to a different port on the same site.
Mitigation
Upgrade to Mechanize v2.8.5 or later.
Notes
See https://curl.se/docs/CVE-2022-27776.html for a similar vulnerability in curl.
Cookies are shared with a server at a different port on the same site, per https://datatracker.ietf.org/doc/html/rfc6265#section-8.5 which states in part:
Cookies do not provide isolation by port. If a cookie is readable by a service running on one port, the cookie is also readable by a service running on another port of the same server. If a cookie is writable by a service on one port, the cookie is also writable by a service running on another port of the same server. For this reason, servers SHOULD NOT both run mutually distrusting services on different ports of the same host and use cookies to store security- sensitive information.
- Record
GHSA-64qm-hrgp-pgr9- CVSS 3.1
- 5.9 Medium
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N - Weakness
- CWE-200, CWE-522
- Updated
- 2026-11-02
OSVUBUNTU-CVE-2022-31033
The Mechanize library is used for automating interaction with websites. Mechanize automatically stores and sends cookies, follows redirects, and can follow links and submit forms. In versions prior to 2.8.5 the Authorization header is leaked after a redirect to a different port on the same site. Users are advised to upgrade to Mechanize v2.8.5 or later. There are no known workarounds for this issue.
- Record
UBUNTU-CVE-2022-31033- CVSS 3.1
- 5.9 Medium
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N - CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N - Updated
- 2026-11-02
OSVDEBIAN-CVE-2022-31033 No score
The Mechanize library is used for automating interaction with websites. Mechanize automatically stores and sends cookies, follows redirects, and can follow links and submit forms. In versions prior to 2.8.5 the Authorization header is leaked after a redirect to a different port on the same site. Users are advised to upgrade to Mechanize v2.8.5 or later. There are no known workarounds for this issue.
- Record
DEBIAN-CVE-2022-31033- Updated
- 2026-11-03
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
mechanizeRubyGems |
before 2.8.5 | 2.8.5 |
ruby-mechanizeDebian:12 |
before 2.8.5-1 | 2.8.5-1 |
ruby-mechanizeDebian:13 |
before 2.8.5-1 | 2.8.5-1 |
ruby-mechanizeDebian:14 |
before 2.8.5-1 | 2.8.5-1 |
mechanizeRubyGems |
before 2.8.5, plus listed versions 0.1.00.1.10.1.20.1.30.2.0 Show 45 moreShow less0.2.10.2.20.2.30.3.00.3.10.4.00.4.10.4.20.4.30.4.40.4.50.4.60.4.70.5.00.5.10.5.20.5.30.5.40.6.00.6.10.6.100.6.110.6.20.6.30.6.40.6.50.6.60.6.70.6.80.6.90.7.00.7.10.7.20.7.30.7.40.7.50.7.60.7.70.7.80.8.00.8.10.8.20.8.30.8.40.8.5 |
2.8.5 |
ruby-mechanizeUbuntu:24.04:LTS |
All versions, plus listed versions 2.8.5-1 |
None known |
ruby-mechanizeUbuntu:25.10 |
All versions, plus listed versions 2.10.1-12.10.1-1.1 |
None known |
ruby-mechanizeUbuntu:26.10 |
All versions, plus listed versions 2.10.1-1.12.14.0-2 |
None known |
ruby-mechanizeUbuntu:26.04:LTS |
All versions, plus listed versions 2.10.1-1.1 |
None known |
History
| Recorded | Changed | Sources |
|---|---|---|
| first indexed | CVE List, EUVD, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2022-31033 is a medium vulnerability (CVSS 5.9) in Mechanize Project Mechanize, published June 9, 2022. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.52%, the 74th percentile. Fixed in mechanize 2.8.5.
References
github.com/sparklemotion/mechanize/security/advisories/GHSA-64qm-hrgp-pgr9
lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/OA2FJROTX2U6EBWDPKRQ2VAM67A5TQXF
nvd.nist.gov/vuln/detail/CVE-2022-31033
Show 7 moreShow less
security-tracker.debian.org/tracker/CVE-2022-31033
ubuntu.com/security/CVE-2022-31033
cve.org/CVERecord?id=CVE-2022-31033
Left out here: 33 versions. The JSON record has them.