CVE-2022-39294: conduit-hyper integrates a conduit application with the hyper server

This month

HIGH 7.5REMOTEUPGRADE

CVE-2022-39294 is a high-severity flaw (CVSS 7.5) affecting conduit-hyper. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

conduit-hyper integrates a conduit application with the hyper server. Prior to version 0.4.2, `conduit-hyper` did not check any limit on a request's length before calling [`hyper::body::to_bytes`](https://docs.rs/hyper/latest/hyper/body/fn.to_bytes.html). An attacker could send a malicious request with an abnormally large `Content-Length`, which could lead to a panic if memory allocation failed for that request. In version 0.4.2, `conduit-hyper`

Why this priority

High severity
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	7.5 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.8% (top 43%)
CISA exploited list	No
Weakness	CWE-400, CWE-1284
Published	2022-10-31
Last modified	2026-06-17

Publisher (CNA): GitHub, Inc. · Vendor: conduit-hyper project

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

Am I affected?

Timeline

2022-10-31 19:15 UTCPublished CVE record published
2026-06-17 04:58 UTCUpdated Record last modified

conduit-hyper project conduit-hyper UPGRADE

Affected: > 0.2.0 and < 0.4.2 · 0.2.0 · 0.2.0 alpha3 · 0.2.0 alpha4

Fixed in: 0.4.2

Safe to downgrade to: a release before 0.2.0

1. Check installed version

apt-cache policy conduit-hyper || rpm -q conduit-hyper || conduit-hyper --version

2. UPGRADE to 0.4.2 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade conduit-hyper

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade conduit-hyper

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 0.2.0 (Debian / Ubuntu)

apt-cache madison conduit-hyper sudo apt install conduit-hyper=<VERSION_BEFORE_0.2.0> sudo apt-mark hold conduit-hyper

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

dnf --showduplicates list conduit-hyper sudo dnf downgrade conduit-hyper-<VERSION_BEFORE_0.2.0> sudo dnf versionlock add conduit-hyper

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-2022-39294?

conduit-hyper: upgrade to 0.4.2. Exact commands for each OS are on this page.

Is CVE-2022-39294 being exploited?

CVE-2022-39294 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-2022-39294 affect?

CVE-2022-39294 affects conduit-hyper. Severity is high (CVSS 7.5). conduit-hyper integrates a conduit application with the hyper server. Prior to version 0.4.2, `conduit-hyper` did not check any limit on a request's length before calling [`hyper::body::to_bytes`](https://docs.rs/hyper/latest/hyper/body/fn.

How urgent is CVE-2022-39294?

Priority 45/100. High severity; Remotely exploitable, no login, no user action

References

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