CVE-2023-26089: European Chemicals Agency IUCLID 6.x before 6.27.6 allows authentication bypass because a weak hard-coded secr

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CRITICAL 9.8REMOTEUPGRADE

CVE-2023-26089 is a critical-severity flaw (CVSS 9.8) affecting iuclid. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

European Chemicals Agency IUCLID 6.x before 6.27.6 allows authentication bypass because a weak hard-coded secret is used for JWT signing. The affected versions are 5.15.0 through 6.27.5.

Why this priority

Critical severity
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	9.8 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	1.1% (top 35%)
CISA exploited list	No
Weakness	CWE-798
Published	2023-05-02
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: echa.europa

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

Am I affected?

Timeline

2023-05-02 20:15 UTCPublished CVE record published
2026-06-17 05:42 UTCUpdated Record last modified

echa.europa iuclid UPGRADE

Affected: >= 5.15.0 and < 6.27.6

Fixed in: 6.27.6

Safe to downgrade to: a release before 5.15.0

1. Check installed version

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

2. UPGRADE to 6.27.6 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade iuclid

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 5.15.0 (Debian / Ubuntu)

apt-cache madison iuclid sudo apt install iuclid=<VERSION_BEFORE_5.15.0> sudo apt-mark hold iuclid

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

dnf --showduplicates list iuclid sudo dnf downgrade iuclid-<VERSION_BEFORE_5.15.0> sudo dnf versionlock add iuclid

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-2023-26089?

iuclid: upgrade to 6.27.6. Exact commands for each OS are on this page.

Is CVE-2023-26089 being exploited?

CVE-2023-26089 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-2023-26089 affect?

CVE-2023-26089 affects iuclid. Severity is critical (CVSS 9.8). European Chemicals Agency IUCLID 6.x before 6.27.6 allows authentication bypass because a weak hard-coded secret is used for JWT signing. The affected versions are 5.15.0 through 6.27.5.

How urgent is CVE-2023-26089?

Priority 56/100. Critical severity; Remotely exploitable, no login, no user action

Related CVEs

CVE-2024-0770 MEDIUM 4.4 DOWNGRADE A vulnerability, which was classified as critical, was found in European Chemicals Agency IUCLID 7.10.3 on Win
CVE-2023-26546 HIGH 8.8 UPGRADE European Chemicals Agency IUCLID before 6.27.6 allows remote authenticated users to execute arbitrary code via

References

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