CVE-2024-42645: An issue in FlashMQ v1.14.0 allows attackers to cause an assertion failure via sending a crafted retain messag

This week

HIGH 7.5REMOTEDOWNGRADE

CVE-2024-42645 is a high-severity flaw (CVSS 7.5) affecting flashmq. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

An issue in FlashMQ v1.14.0 allows attackers to cause an assertion failure via sending a crafted retain message, leading to a Denial of Service (DoS).

Why this priority

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

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	7.5 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.5% (top 54%)
CISA exploited list	No
Weakness	CWE-617
Published	2025-07-29
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: flashmq

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

Am I affected?

Timeline

2025-07-29 14:15 UTCPublished CVE record published
2026-06-17 07:49 UTCUpdated Record last modified

flashmq flashmq DOWNGRADE

Affected: 1.14.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.14.0

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 1.14.0 (Debian / Ubuntu)

apt-cache madison flashmq sudo apt install flashmq=<VERSION_BEFORE_1.14.0> sudo apt-mark hold flashmq

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list flashmq sudo dnf downgrade flashmq-<VERSION_BEFORE_1.14.0> sudo dnf versionlock add flashmq

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-2024-42645?

flashmq: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2024-42645 being exploited?

CVE-2024-42645 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-2024-42645 affect?

CVE-2024-42645 affects flashmq. Severity is high (CVSS 7.5). An issue in FlashMQ v1.14.0 allows attackers to cause an assertion failure via sending a crafted retain message, leading to a Denial of Service (DoS).

How urgent is CVE-2024-42645?

Priority 48/100. High severity; Public exploit reference; Remotely exploitable, no login, no user action

Related CVEs

CVE-2025-62723 MEDIUM 4.3 UPGRADE FlashMQ is a MQTT broker/server, designed for multi-CPU environments
CVE-2024-42644 HIGH 7.5 DOWNGRADE FlashMQ v1.14.0 was discovered to contain an assertion failure in the function PublishCopyFactory::getNewPubli

References

← Back to latest CVEs