CVE-2026-15561: Allocation of Resources Without Limits or Throttling in Red Hat Red Hat JBoss Enterprise Application Platform 7.4 ELS on RHEL 7
CVE-2026-15561 is a vulnerability in Red Hat JBoss Enterprise Application Platform 7.4 ELS on RHEL 7 involving the undertow HTTP/1.1 chunked-transfer decoder. The flaw allows an unauthenticated attacker to cause an OutOfMemory error by exploiting missing limits on size and count in chunked transfer decoding, resulting in denial of service by stopping all deployments on the listener. A security update fixing this issue is available in version 7.4.25.
AI Analysis
Technical Summary
This vulnerability exists in the undertow HTTP/1.1 chunked-transfer decoder component of Red Hat JBoss Enterprise Application Platform 7.4 ELS on RHEL 7. Due to missing limits on the size and count of chunked transfers, an unauthenticated attacker can send specially crafted requests that exhaust JVM memory, causing an OutOfMemory error. This leads to denial of service by halting all deployments on the affected listener. The issue is tracked as CVE-2026-15561 and has a CVSS v3.1 score of 7.5 (high severity). Red Hat has released a security update in version 7.4.25 to address this flaw.
Potential Impact
Successful exploitation results in a denial of service condition by causing the JVM to run out of memory, which stops all deployments on the affected listener. There is no impact on confidentiality or integrity reported. The vulnerability can be triggered without authentication over the network.
Mitigation Recommendations
A security update is available in Red Hat JBoss Enterprise Application Platform version 7.4.25. Users should upgrade to this version or later to remediate the vulnerability. No additional mitigation steps are required as the fix addresses the root cause by imposing proper limits on chunked transfer decoding.
CVE-2026-15561: Allocation of Resources Without Limits or Throttling in Red Hat Red Hat JBoss Enterprise Application Platform 7.4 ELS on RHEL 7
Description
CVE-2026-15561 is a vulnerability in Red Hat JBoss Enterprise Application Platform 7.4 ELS on RHEL 7 involving the undertow HTTP/1.1 chunked-transfer decoder. The flaw allows an unauthenticated attacker to cause an OutOfMemory error by exploiting missing limits on size and count in chunked transfer decoding, resulting in denial of service by stopping all deployments on the listener. A security update fixing this issue is available in version 7.4.25.
CVSS v3.1
Score 7.5high
Affected software
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Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability exists in the undertow HTTP/1.1 chunked-transfer decoder component of Red Hat JBoss Enterprise Application Platform 7.4 ELS on RHEL 7. Due to missing limits on the size and count of chunked transfers, an unauthenticated attacker can send specially crafted requests that exhaust JVM memory, causing an OutOfMemory error. This leads to denial of service by halting all deployments on the affected listener. The issue is tracked as CVE-2026-15561 and has a CVSS v3.1 score of 7.5 (high severity). Red Hat has released a security update in version 7.4.25 to address this flaw.
Potential Impact
Successful exploitation results in a denial of service condition by causing the JVM to run out of memory, which stops all deployments on the affected listener. There is no impact on confidentiality or integrity reported. The vulnerability can be triggered without authentication over the network.
Mitigation Recommendations
A security update is available in Red Hat JBoss Enterprise Application Platform version 7.4.25. Users should upgrade to this version or later to remediate the vulnerability. No additional mitigation steps are required as the fix addresses the root cause by imposing proper limits on chunked transfer decoding.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-fhmg-q5fc-2m8v
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-15561"]
- Database Specific Severity
- HIGH
- Cvss Version
- 3.1
- State
- PUBLISHED
Patch Information
Threat ID: 6a7c9b72bf8831d539ce081d
Added to database: 08/12/2026, 16:12:34 UTC
Last enriched: 09/18/2026, 01:58:29 UTC
Last updated: 09/26/2026, 13:47:43 UTC
Views: 44
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