CVE-2026-33637: Faraday is an HTTP client library abstraction layer that provides a common interface over many adapters

This week

NONE 0.0REMOTEUPGRADE

CVE-2026-33637 is a none-severity flaw (CVSS 0.0) affecting faraday. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Faraday is an HTTP client library abstraction layer that provides a common interface over many adapters. Versions 2.0.0 through 2.14.1 still allow protocol-relative host override when the request target is passed as a URI object (rather than a String) to Faraday::Connection#build_exclusive_url. This bypasses the February 2026 fix for GHSA-33mh-2634-fwr2 and enables off-host request forgery: a request built from a fixed-base Faraday::Connection ca

Why this priority

Public exploit reference
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	0.0 (None)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.3% (top 81%)
CISA exploited list	No
Weakness	CWE-918
Published	2026-05-19
Last modified	2026-07-24

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

Last updated 2026-07-24 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-05-19 19:16 UTCPublished CVE record published
2026-07-24 09:10 UTCUpdated Record last modified

faraday project faraday UPGRADE

Affected: >= 2.0.0 and < 2.14.2

Fixed in: 2.14.2

Safe to downgrade to: a release before 2.0.0

1. Check installed version

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

2. UPGRADE to 2.14.2 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade faraday

Note

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

3. If no update is available yet, DOWNGRADE to a release before 2.0.0 (Debian / Ubuntu)

apt-cache madison faraday sudo apt install faraday=<VERSION_BEFORE_2.0.0> sudo apt-mark hold faraday

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list faraday sudo dnf downgrade faraday-<VERSION_BEFORE_2.0.0> sudo dnf versionlock add faraday

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

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-2026-33637?

faraday: upgrade to 2.14.2. Exact commands for each OS are on this page.

Is CVE-2026-33637 being exploited?

CVE-2026-33637 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-2026-33637 affect?

CVE-2026-33637 affects faraday. Severity is none (CVSS 0.0). Faraday is an HTTP client library abstraction layer that provides a common interface over many adapters. Versions 2.0.0 through 2.14.1 still allow protocol-relative host override when the request target is passed as a URI object (rather tha

How urgent is CVE-2026-33637?

Priority 15/100. Public exploit reference; Remotely exploitable, no login, no user action

Related CVEs

CVE-2026-54297 HIGH 7.5 UPGRADE Faraday is an HTTP client library abstraction layer that provides a common interface over many adapters

References

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