PT-2026-64277 · Apereo · Jasig Cas Client+1

Krzysztof Surówka + 2 · CVE-2026-15243 · Publicado 2026-07-24 · Atualizado 2026-07-24

Mitre

CVSS v4.0

7.4

Alta

Vetor base

AV:N/AC:L/AT:P/PR:N/UI:A/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N

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.

Correção

Enumeração de Fraquezas

CWE-297

Identificadores relacionados

CVE-2026-15243

Produtos afetados

Jasig Cas Client

Java Apereo Cas Client

Referências · 3

• https://cert.pl/en/posts/2026/07/CVE-2026-15243 · Nota
• https://nvd.nist.gov/vuln/detail/CVE-2026-15243 · Nota de Segurança
• https://apereo.org/programs/software/cas · Nota