CVE-2024-26133: EventStoreDB (ESDB) is an operational database built to store events

Routine

MEDIUM 5.5UPGRADE

CVE-2024-26133 is a medium-severity flaw (CVSS 5.5) affecting eventstoredb. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

EventStoreDB (ESDB) is an operational database built to store events. A vulnerability has been identified in the projections subsystem in versions 20 prior to 20.10.6, 21 prior to 21.10.11, 22 prior to 22.10.5, and 23 prior to 23.10.1. Only database instances that use custom projections are affected by this vulnerability. User passwords may become accessible to those who have access to the chunk files on disk, and users who have read access to sy

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	5.5 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	High
User interaction	None
EPSS exploit chance	0.6% (top 51%)
CISA exploited list	No
Weakness	CWE-256, CWE-522
Published	2024-02-21
Last modified	2026-06-17

Publisher (CNA): GitHub, Inc. · Vendor: kurrent

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

Am I affected?

Timeline

2024-02-21 17:15 UTCPublished CVE record published
2026-06-17 07:17 UTCUpdated Record last modified

kurrent eventstoredb UPGRADE

Affected: >= 20.10.0 and < 20.10.6 · >= 21.10.0 and < 21.10.11 · >= 22.10.0 and < 22.10.5 · >= 23.10.0 and < 23.10.1

Fixed in: 20.10.6, 21.10.11, 22.10.5, 23.10.1

Safe to downgrade to: a release before 20.10.0

1. Check installed version

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

2. UPGRADE to 20.10.6 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade eventstoredb

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 20.10.0 (Debian / Ubuntu)

apt-cache madison eventstoredb sudo apt install eventstoredb=<VERSION_BEFORE_20.10.0> sudo apt-mark hold eventstoredb

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

dnf --showduplicates list eventstoredb sudo dnf downgrade eventstoredb-<VERSION_BEFORE_20.10.0> sudo dnf versionlock add eventstoredb

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-2024-26133?

eventstoredb: upgrade to 20.10.6, 21.10.11, 22.10.5, 23.10.1. Exact commands for each OS are on this page.

Is CVE-2024-26133 being exploited?

CVE-2024-26133 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-2024-26133 affect?

CVE-2024-26133 affects eventstoredb. Severity is medium (CVSS 5.5). EventStoreDB (ESDB) is an operational database built to store events. A vulnerability has been identified in the projections subsystem in versions 20 prior to 20.10.6, 21 prior to 21.10.11, 22 prior to 22.10.5, and 23 prior to 23.10.1. Only

How urgent is CVE-2024-26133?

Priority 32/100. No elevated risk signals yet.

References

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