CVE-2024-58135: Mojolicious versions from 7.28 through 9.45 for Perl will generate weak HMAC session cookie secrets via "mojo

This week

MEDIUM 5.3REMOTEUPGRADE

CVE-2024-58135 is a medium-severity flaw (CVSS 5.3) affecting mojolicious. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Mojolicious versions from 7.28 through 9.45 for Perl will generate weak HMAC session cookie secrets via "mojo generate app" by default. When creating a default app skeleton with the "mojo generate app" tool, a weak secret is written to the application's configuration file using the insecure rand() function, and used for authenticating and protecting the integrity of the application's sessions. This may allow an attacker to brute force the applic

Why this priority

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

A fixed release or distro patch exists.

Risk facts

CVSS score	5.3 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.6% (top 53%)
CISA exploited list	No
Weakness	CWE-338
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 11:15 UTCPublished CVE record published
2026-06-17 08:14 UTCUpdated Record last modified

mojolicious mojolicious UPGRADE

Affected: >= 7.28 and <= 9.40

Fixed in: newer than 9.40

Safe to downgrade to: a release before 7.28

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 7.28 (Debian / Ubuntu)

apt-cache madison mojolicious sudo apt install mojolicious=<VERSION_BEFORE_7.28> 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_7.28> 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-2024-58135?

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

Is CVE-2024-58135 being exploited?

CVE-2024-58135 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-2024-58135 affect?

CVE-2024-58135 affects mojolicious. Severity is medium (CVSS 5.3). Mojolicious versions from 7.28 through 9.45 for Perl will generate weak HMAC session cookie secrets via "mojo generate app" by default. When creating a default app skeleton with the "mojo generate app" tool, a weak secret is written to the

How urgent is CVE-2024-58135?

Priority 40/100. Public exploit reference; Remotely exploitable, no login, no user action

Software pages

Perl vulnerabilities

Related CVEs

CVE-2024-58134 HIGH 8.1 UPGRADE Mojolicious versions from 0.999922 for Perl uses a hard coded string, or the application's class name, as an H
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

← Back to latest CVEs