EUVD-2026-77090
GHSA-9rqx-8vr7-9c9f
Severity by source
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
No authentication required beyond WebSocket handshake; 2 GiB allocation attempt realistically crashes the JVM process, warranting A:H over A:L.
Primary rating from Vendor (VulDB).
CVSS VectorVendor: VulDB
Lifecycle Timeline
4DescriptionCVE.org
A weakness has been identified in TooTallNate Java-WebSocket up to 1.6.1. The impacted element is the function processFrameContinuousAndNonFin of the file Draft_6455.java of the component Fragmentation Handler. Executing a manipulation can lead to allocation of resources. The attack may be performed from remote. The exploit has been made available to the public and could be used for attacks. The pull request to fix this issue awaits acceptance.
AnalysisAI
Unconstrained memory allocation in TooTallNate Java-WebSocket 1.6.0-1.6.1 allows remote unauthenticated attackers to exhaust server heap memory by sending WebSocket frames with arbitrarily large declared payload lengths. The Draft_6455 fragmentation handler initialized maxFrameSize to Integer.MAX_VALUE (~2 GiB), so the library attempts to allocate the full declared frame size before any payload data is actually received. …
Unlock full vulnerability intelligence
- Risk assessment & exploitation conditions
- Attack chain visualization
- Remediation with exact patch versions
- Threat intelligence from 22 sources
- Personal watchlist & email alerts
Free forever · No credit card required
Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | The target must be running Java-WebSocket 1.6.0 or 1.6.1 with the default Draft_6455 constructor (no explicit maxFrameSize argument), which sets the limit to Integer.MAX_VALUE. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 4.0 vector (AV:N/AC:L/AT:N/PR:N/UI:N) correctly reflects a fully remote, unauthenticated, zero-complexity attack path - any client that can complete a WebSocket upgrade handshake can trigger the flaw. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | The upstream fix is available in PR #1509 (https://github.com/TooTallNate/Java-WebSocket/pull/1509) but has not been merged or released in a tagged version as of this analysis - monitor the repository for a patched release and upgrade as soon as one ships. … Detailed patch versions, workarounds, and compensating controls in full report. |
Threat intelligence, references, and detailed analysis are available after sign-in.
Oracle Java SE 7 Update 6 and earlier contains multiple sandbox bypass vulnerabilities via the ClassFinder and forName m
Remote code execution in IBM Sterling B2B Integrator, Sterling Integrator, and Tivoli Common Reporting allows unauthenti
Java Runtime Environment sandbox bypass via incorrect image channel verification in 2D component allows remote unauthent
Oracle Java SE JDK/JRE 7 and 6 Update 27 and earlier allows remote code execution with complete system compromise throug
JBoss Seam 2 in Red Hat JBoss EAP 4.3.0 fails to sanitize JBoss Expression Language inputs, allowing remote attackers to
Unspecified vulnerability in the Java Runtime Environment (JRE) component in Oracle Java SE 7 update 4 and earlier, 6 up
Multiple vulnerabilities in Oracle Java 7 before Update 11 allow remote attackers to execute arbitrary code by (1) using
Unspecified vulnerability in the Java Runtime Environment (JRE) component in Oracle Java SE 7 Update 2 and earlier, 6 Up
The WLS Security component in Oracle WebLogic Server 10.3.6.0, 12.1.2.0, 12.1.3.0, and 12.2.1.0 allows remote attackers
Unspecified vulnerability in the Java Runtime Environment (JRE) component in Oracle Java SE 7 Update 7 and earlier allow
Remote unauthenticated attackers can execute arbitrary code on Adobe ColdFusion servers through Java deserialization fla
The ExceptionDelegator component in Apache Struts before 2.2.3.1 interprets parameter values as OGNL expressions during
Same technique Denial Of Service
View allShare
External POC / Exploit Code
Leaving vuln.today