CVE-2026-28511: eLabFTW is an open source electronic lab notebook

Q: How do I fix CVE-2026-28511?

elabftw: upgrade to 5.4.2. Exact commands for each OS are on this page.

Q: Is CVE-2026-28511 being exploited?

CVE-2026-28511 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-28511 affect?

CVE-2026-28511 affects elabftw. Severity is medium (CVSS 4.3). eLabFTW is an open source electronic lab notebook. Prior to version 5.4.2, in certain cases, an authenticated user performing a numeric reference/search can return results that include resources the requesting user is not authorized to view

Q: How urgent is CVE-2026-28511?

Priority 17/100. No elevated risk signals yet.

Routine

MEDIUM 4.3UPGRADE

CVE-2026-28511 is a medium-severity flaw (CVSS 4.3) affecting elabftw. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

eLabFTW is an open source electronic lab notebook. Prior to version 5.4.2, in certain cases, an authenticated user performing a numeric reference/search can return results that include resources the requesting user is not authorized to view. The exposed information is limited (only the title). Attempts to access the underlying protected resource content remain blocked by authorization checks. Version 5.4.2 fixes the issue. # Affected Scope Cros

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	4.3 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.2% (top 92%)
CISA exploited list	No
Weakness	CWE-200
Published	2026-06-01
Last modified	2026-07-22

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

Last updated 2026-07-22 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-06-01 23:16 UTCPublished CVE record published
2026-07-22 19:10 UTCUpdated Record last modified

elabftw elabftw UPGRADE

Affected: < 5.4.2

Fixed in: 5.4.2

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to 5.4.2 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade elabftw

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

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-2026-28511?

elabftw: upgrade to 5.4.2. Exact commands for each OS are on this page.

Is CVE-2026-28511 being exploited?

CVE-2026-28511 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-2026-28511 affect?

CVE-2026-28511 affects elabftw. Severity is medium (CVSS 4.3). eLabFTW is an open source electronic lab notebook. Prior to version 5.4.2, in certain cases, an authenticated user performing a numeric reference/search can return results that include resources the requesting user is not authorized to view

How urgent is CVE-2026-28511?

Priority 17/100. No elevated risk signals yet.

References

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