CVE-2024-58134: Mojolicious versions from 0.999922 for Perl uses a hard coded string, or the application's class name, as an H

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HIGH 8.1UPGRADE

CVE-2024-58134 is a high-severity flaw (CVSS 8.1) affecting mojolicious. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Mojolicious versions from 0.999922 for Perl uses a hard coded string, or the application's class name, as an HMAC session cookie secret by default. These predictable default secrets can be exploited by an attacker to forge session cookies. An attacker who knows or guesses the secret could compute valid HMAC signatures for the session cookie, allowing them to tamper with or hijack another user’s session.

Why this priority

High severity
Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	8.1 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.5% (top 54%)
CISA exploited list	No
Weakness	CWE-321, CWE-331
Published	2025-05-03
Last modified	2026-06-17

Publisher (CNA): CPANSec · Vendor: mojolicious

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

Am I affected?

Timeline

2025-05-03 16:15 UTCPublished CVE record published
2026-06-17 08:14 UTCUpdated Record last modified

mojolicious mojolicious UPGRADE

Affected: >= 0.999922 and <= 9.40

Fixed in: newer than 9.40

Safe to downgrade to: a release before 0.999922

1. Check installed version

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

2. UPGRADE to newer than 9.40 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade mojolicious

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 0.999922 (Debian / Ubuntu)

apt-cache madison mojolicious sudo apt install mojolicious=<VERSION_BEFORE_0.999922> sudo apt-mark hold mojolicious

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

dnf --showduplicates list mojolicious sudo dnf downgrade mojolicious-<VERSION_BEFORE_0.999922> sudo dnf versionlock add mojolicious

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-2024-58134?

mojolicious: upgrade to newer than 9.40. Exact commands for each OS are on this page.

Is CVE-2024-58134 being exploited?

CVE-2024-58134 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-2024-58134 affect?

CVE-2024-58134 affects mojolicious. Severity is high (CVSS 8.1). Mojolicious versions from 0.999922 for Perl uses a hard coded string, or the application's class name, as an HMAC session cookie secret by default. These predictable default secrets can be exploited by an attacker to forge session cookies.

How urgent is CVE-2024-58134?

Priority 45/100. High severity; Public exploit reference

Software pages

Perl vulnerabilities

Related CVEs

CVE-2024-58135 MEDIUM 5.3 UPGRADE Mojolicious versions from 7.28 through 9.45 for Perl will generate weak HMAC session cookie secrets via "mojo
CVE-2021-47208 MEDIUM 4.3 UPGRADE The Mojolicious module before 9.11 for Perl has a bug in format detection that can potentially be exploited fo

References

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