EUVD-2026-50232
GHSA-xq5v-8whr-7mvx
Severity by source
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:X/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
Upstream-controlled input dependency justifies AC:H; DoS-only buffer overrun with no code execution path yields A:L and C:N/I:N.
Primary rating from Vendor (apache).
CVSS VectorVendor: apache
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:X/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
Lifecycle Timeline
3DescriptionCVE.org
The Apache Traffic Server multiplexer plugin overruns its chunk-decode buffer on upstream input, enabling denial of service.
This issue affects Apache Traffic Server: from 8.0.0 through 8.1.9, from 9.0.0 through 9.2.14, from 10.0.0 through 10.1.3.
Users are recommended to upgrade to version 9.2.15 or 10.1.4, which fix the issue.
AnalysisAI
Buffer overrun in the Apache Traffic Server multiplexer plugin's chunk-decode logic allows network-adjacent attackers who can influence upstream origin responses to cause denial of service across versions 8.0.0 through 10.1.3. The flaw is classified as CWE-787 (Out-of-bounds Write) and is constrained to availability impact only - no code execution or data exposure is indicated. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires that the Apache Traffic Server multiplexer plugin is loaded and actively processing upstream responses. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 3.7 Low score accurately reflects the constrained risk posture of this vulnerability. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An attacker who has compromised or can manipulate a configured upstream origin server sends a crafted HTTP response containing malformed chunked transfer encoding to an Apache Traffic Server instance running the multiplexer plugin. The chunk-decode buffer is overrun, causing the plugin or the ATS worker process to crash and denying service to downstream clients. … |
| Remediation | Vendor-released patches are available: upgrade to Apache Traffic Server 9.2.15 (for 9.x users) or 10.1.4 (for 10.x users), as confirmed by the Apache advisory at https://lists.apache.org/thread/5prl9glcm9g2swnq9hqxvnokylm1gr6d. … Detailed patch versions, workarounds, and compensating controls in full report. |
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Same weakness CWE-787 – Out-of-bounds Write
View allSame technique Buffer Overflow
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External POC / Exploit Code
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