CVE Explorer
CVE-2026-15243
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.
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
1
Preserved source conflicts
No provider value was silently selected as the winner.
affected · 2 assertions
{"defaultStatus":"unknown","product":"Java Apereo CAS Client","repo":"https://github.com/apereo/java-cas-client","vendor":"Apereo","versions":[{"status":"affected","version":"4.1.0","versionType":"semver"}]}
- cve_program_cvelist_v5affectedurn:baitaphish:normalized-source-record:v2:c892b9de025082be6dd659eb7b97b99bbe57ff2f5a7f0598a9cc4cb17a452b47 · sha256:de978aa1799dfead… · /containers/cna/affected/0
{"collectionURL":"https://mvnrepository.com/","defaultStatus":"unknown","packageName":"org.jasig.cas.client","product":"Jasig CAS Client","repo":"https://github.com/apereo/java-cas-client","vendor":"Apereo","versions":[{"status":"affected","version":"3.6.4"}]}
- cve_program_cvelist_v5affectedurn:baitaphish:normalized-source-record:v2:c892b9de025082be6dd659eb7b97b99bbe57ff2f5a7f0598a9cc4cb17a452b47 · sha256:de978aa1799dfead… · /containers/cna/affected/1
Affected products and versions
2 source assertions{"defaultStatus":"unknown","product":"Java Apereo CAS Client","repo":"https://github.com/apereo/java-cas-client","vendor":"Apereo","versions":[{"status":"affected","version":"4.1.0","versionType":"semver"}]}
- cve_program_cvelist_v5affectedurn:baitaphish:normalized-source-record:v2:c892b9de025082be6dd659eb7b97b99bbe57ff2f5a7f0598a9cc4cb17a452b47 · sha256:de978aa1799dfead… · /containers/cna/affected/0
{"collectionURL":"https://mvnrepository.com/","defaultStatus":"unknown","packageName":"org.jasig.cas.client","product":"Jasig CAS Client","repo":"https://github.com/apereo/java-cas-client","vendor":"Apereo","versions":[{"status":"affected","version":"3.6.4"}]}
- cve_program_cvelist_v5affectedurn:baitaphish:normalized-source-record:v2:c892b9de025082be6dd659eb7b97b99bbe57ff2f5a7f0598a9cc4cb17a452b47 · sha256:de978aa1799dfead… · /containers/cna/affected/1
Provider-owned CVSS observations
1 source assertion{"metric":{"Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","Safety":"NOT_DEFINED","attackComplexity":"LOW","attackRequirements":"PRESENT","attackVector":"NETWORK","baseScore":7.4,"baseSeverity":"HIGH","exploitMaturity":"NOT_DEFINED","privilegesRequired":"NONE","providerUrgency":"NOT_DEFINED","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"ACTIVE","valueDensity":"NOT_DEFINED","vectorString":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N","version":"4.0","vulnAvailabilityImpact":"NONE","vulnConfidentialityImpa…
- cve_program_cvelist_v5cvssurn:baitaphish:normalized-source-record:v2:c892b9de025082be6dd659eb7b97b99bbe57ff2f5a7f0598a9cc4cb17a452b47 · sha256:de978aa1799dfead… · /containers/cna/metrics/0/cvssV4_0
CWE assertions
1 source assertion{"cweId":"CWE-297","description":"CWE-297 Improper validation of certificate with host mismatch","lang":"en","type":"CWE"}
- cve_program_cvelist_v5cweurn:baitaphish:normalized-source-record:v2:c892b9de025082be6dd659eb7b97b99bbe57ff2f5a7f0598a9cc4cb17a452b47 · sha256:de978aa1799dfead… · /containers/cna/problemTypes/0/descriptions/0
Source references
2 source assertions{"tags":["third-party-advisory"],"url":"https://cert.pl/en/posts/2026/07/CVE-2026-15243"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:c892b9de025082be6dd659eb7b97b99bbe57ff2f5a7f0598a9cc4cb17a452b47 · sha256:de978aa1799dfead… · /containers/cna/references/0
{"tags":["product"],"url":"https://www.apereo.org/programs/software/cas"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:c892b9de025082be6dd659eb7b97b99bbe57ff2f5a7f0598a9cc4cb17a452b47 · sha256:de978aa1799dfead… · /containers/cna/references/1
Attribution and limitations
- CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →
Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.