EUVD-2026-84425
GHSA-gr7x-rp46-7mvw
Severity by source
AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Unauthenticated network message crashes the decode thread (PR:N, A:H, C/I:N); AC:H because reaching the internal ZMQ control socket depends on non-default network exposure.
Primary rating from Vendor (certcc).
CVSS VectorVendor: certcc
Lifecycle Timeline
2DescriptionCVE.org
SGLang contains a DoS vulnerability caused by missing input validation for AUX_DATA ZeroMQ control messages in the Decode worker, which enables an unauthenticated remote attacker with network reachability to the Decode control PULL socket to terminate the Decode control thread and cause a denial of service against the target server.
AnalysisAI
Malformed ZeroMQ AUX_DATA control messages can terminate the Decode worker's control thread in SGLang 0 through 0.5.15, letting an unauthenticated attacker who can reach the Decode control PULL socket take the inference server offline. The flaw is a missing input-validation check on the control-message path (availability-only impact; no data exposure or code execution), and the assessed CVSS 3.1 vector is AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H for a base score of 5.9. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Requires network reachability to the SGLang Decode worker's ZeroMQ control PULL socket and the ability to send it a malformed AUX_DATA control message; no authentication or user interaction is needed (PR:N/UI:N). … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | This is a genuine but bounded-severity issue. … 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 | No vendor-released patch was identified at time of analysis, so mitigation must be architectural: bind the Decode worker's ZeroMQ control PULL socket to localhost (127.0.0.1) or an internal-only interface instead of a routable address, and enforce host/network firewall rules that allow only trusted prefill or scheduler nodes to reach that port. … Detailed patch versions, workarounds, and compensating controls in full report. |
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View allVendor StatusVendor
SUSE
Severity: Moderate| Product | Status |
|---|---|
| openSUSE Tumbleweed | Fixed |
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