CVE-2023-26089Network attack vector

Unauthenticated access via forgeable JWT signatures

Published May 2, 2023 · Updated Jan 30, 2025

Authentication bypass in European Chemicals Agency IUCLID 5.15.0 through 6.27.5 allows remote attackers to gain application access. The server verifies JSON Web Tokens with a weak hard-coded signing secret, so attackers who obtain that shared value can mint tokens the application accepts as authentic. No credentials or user interaction are required, and forged tokens grant access to protected IUCLID functions and data under the asserted identity.

CVSS severity9.8
Critical
EPSS probability1.07%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Authentication bypass in European Chemicals Agency IUCLID 5.15.0 through 6.27.5 allows remote attackers to gain application access. The server verifies JSON Web Tokens with a weak hard-coded signing secret, so attackers who obtain that shared value can mint tokens the application accepts as authentic. No credentials or user interaction are required, and forged tokens grant access to protected IUCLID functions and data under the asserted identity.

The record

CVE
CVE-2023-26089
Published
May 2, 2023
Updated
Jan 30, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-798, CAPEC-191, T1550.001
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 2, 2023CVE publishedPublication date reported by the CVE source.
  2. Jan 30, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

9.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
9.8CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-798Use of Hard-coded Credentials
CAPEC-191Read Sensitive Constants Within an Executable
T1550.001Use Alternate Authentication Material: Application Access Token

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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