CVE-2022-31033: The Mechanize library is used for automating interaction with websites

Q: How do I fix CVE-2022-31033?

mechanize: upgrade to 2.8.5; fedora: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Q: Is CVE-2022-31033 being exploited?

CVE-2022-31033 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2022-31033 affect?

CVE-2022-31033 affects mechanize, fedora. Severity is medium (CVSS 5.9). 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 leake

Q: How urgent is CVE-2022-31033?

Priority 44/100. Remotely exploitable, no login, no user action

This month

MEDIUM 5.9REMOTEUPGRADEMITIGATE

CVE-2022-31033 is a medium-severity flaw (CVSS 5.9) affecting mechanize, fedora. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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.

Why this priority

Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	5.9 (Medium)
Attack vector	Network (remote)
Attack complexity	High
Privileges needed	None
User interaction	None
EPSS exploit chance	1.5% (top 25%)
CISA exploited list	No
Weakness	CWE-200
Published	2022-06-09
Last modified	2026-06-17

Publisher (CNA): GitHub, Inc. · Vendor: fedoraproject · mechanize project

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2022-06-09 20:15 UTCPublished CVE record published
2026-06-17 04:44 UTCUpdated Record last modified

mechanize project mechanize UPGRADE

Affected: < 2.8.5

Fixed in: 2.8.5

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy mechanize || rpm -q mechanize || mechanize --version

2. UPGRADE to 2.8.5 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade mechanize

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade mechanize

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

fedoraproject fedora MITIGATE

Affected: 35 · 36

Fixed in: no fixed release known

Safe to downgrade to: a release before 35

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2022-31033?

mechanize: upgrade to 2.8.5; fedora: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2022-31033 being exploited?

CVE-2022-31033 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2022-31033 affect?

CVE-2022-31033 affects mechanize, fedora. Severity is medium (CVSS 5.9). 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 leake

How urgent is CVE-2022-31033?

Priority 44/100. Remotely exploitable, no login, no user action

Related CVEs

CVE-2021-32837 HIGH 7.5 UPGRADE mechanize, a library for automatically interacting with HTTP web servers, contains a regular expression that i

References

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