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🛡️ CVE-2026-15243

⚪ Unknown ✅ No Known Exploit CWE-297 NVD
N/A
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

Apereo CAS Client accepts any CA-trusted certificate for any hostname, provided the URL the client is calling matches the configured allowlist or regex. An attacker with a MITM position (DNS poisoning, rogue Wi-Fi, malicious proxy, etc.) can provide any CA-signed certificate for a hostname that matches the configured allowlist or regex. This can lead to intercepting the CAS exchange, capturing the Ticket-Granting Ticket (TGT), and subsequently obtaining Service Tickets on behalf of the victim. 

Because maintainers contact attempts were unsuccessful, vulnerabilities have only been confirmed in version 4.1.0 (Java Apereo CAS Client) and 3.6.4 (Jasig CAS Client) but may also affect other versions.

Weakness class

CVE-2026-15243 is classified as CWE-297: Improper Validation of Certificate with Host Mismatch. The product communicates with a host that provides a certificate, but the product does not properly ensure that the certificate is actually associated with that host.

Affected software

CVE-2026-15243 is recorded against 1 package.

  • unknown

Timeline and source

Published on 24 July 2026 and last revised on 30 July 2026. No public exploit is currently recorded for this entry. Record sourced from NVD.

References

cert.pl
www.apereo.org

Other advisories for this package

unknown has other advisories on record. If you are patching this one, these are worth checking on the same host:

Same weakness in other software

These advisories are the same class of weakness (CWE-297: Improper Validation of Certificate with Host Mismatch) in other software:

Details

Severity Unknown
CVSS Score N/A
CVSS Vector N/A
CWE CWE-297
Public Exploit ✅ No
Source NVD
Published 2026-07-24
Updated 2026-08-20
Modified 2026-07-30
Fix URL N/A

Affected Packages

Software From version Fixed in
unknown

Similar Threats

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ⓘ Data Notice: The information presented above has been compiled from publicly available internet sources. Boteraser aggregates this data solely for informational purposes and does not independently classify, evaluate, or endorse any findings about the vulnerabilities listed. The accuracy and completeness of this information is the sole responsibility of the original publishers. Boteraser and its operators accept no liability for any decisions made based on this data.

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