CVE-2023-31826: Skyscreamer Open Source Nevado JMS v1.3.2 does not perform security checks when receiving messages

Routine

HIGH 7.8DOWNGRADE

CVE-2023-31826 is a high-severity flaw (CVSS 7.8) affecting nevado jms. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Skyscreamer Open Source Nevado JMS v1.3.2 does not perform security checks when receiving messages. This allows attackers to execute arbitrary commands via supplying crafted data.

Why this priority

High severity
Public exploit reference

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

Risk facts

CVSS score	7.8 (High)
Attack vector	Local
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.3% (top 76%)
CISA exploited list	No
Weakness	CWE-862
Published	2023-05-23
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: skyscreamer

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

Am I affected?

Timeline

2023-05-23 01:15 UTCPublished CVE record published
2026-06-17 05:57 UTCUpdated Record last modified

skyscreamer nevado jms DOWNGRADE

Affected: 1.3.2

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.3.2

1. Check installed version

apt-cache policy nevado-jms || rpm -q nevado-jms || nevado-jms --version

2. No fixed release: DOWNGRADE to a release before 1.3.2 (Debian / Ubuntu)

apt-cache madison nevado-jms sudo apt install nevado-jms=<VERSION_BEFORE_1.3.2> sudo apt-mark hold nevado-jms

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

dnf --showduplicates list nevado-jms sudo dnf downgrade nevado-jms-<VERSION_BEFORE_1.3.2> sudo dnf versionlock add nevado-jms

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-2023-31826?

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

Is CVE-2023-31826 being exploited?

CVE-2023-31826 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-2023-31826 affect?

CVE-2023-31826 affects nevado jms. Severity is high (CVSS 7.8). Skyscreamer Open Source Nevado JMS v1.3.2 does not perform security checks when receiving messages. This allows attackers to execute arbitrary commands via supplying crafted data.

How urgent is CVE-2023-31826?

Priority 38/100. High severity; Public exploit reference

References

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