EUVD-2026-50219
GHSA-6mpw-4jp8-fpfw
Severity by source
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:H/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
Network-reachable and unauthenticated (AV:N/PR:N), but the object-lifetime/race attack requirement maps to AC:H; impact is mainly a crash (A:H) with minor cache-state corruption (I:L) and no confidentiality loss.
Primary rating from Vendor (apache).
CVSS VectorVendor: apache
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:H/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
7DescriptionCVE.org
Apache Traffic Server mishandles on-disk cache fields and object lifetimes, corrupting state or crashing.
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
Denial-of-service and cache-integrity corruption in Apache Traffic Server (8.0.0-8.1.9, 9.0.0-9.2.14, 10.0.0-10.1.3) allows remote unauthenticated attackers to crash the proxy or corrupt its internal state by abusing how on-disk cache fields and object lifetimes are deserialized and managed. The flaw is a CWE-502 untrusted-deserialization class issue tied to the disk cache subsystem; there is no public exploit identified at time of analysis and it is not listed in CISA KEV. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires that Apache Traffic Server's on-disk cache is in use (persistent disk caching is a standard ATS deployment mode) so that malformed cache fields and object metadata are serialized and later deserialized - this disk-cache path is the vulnerable surface. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 4.0 vector (AV:N/AC:L/AT:P/PR:N/UI:N, VC:N/VI:L/VA:H) describes a network-reachable, unauthenticated, low-complexity issue whose primary impact is availability (VA:H, likely a crash/DoS) with only limited integrity impact (VI:L, cache-state corruption) and no confidentiality loss - consistent with the description of 'corrupting state or crashing.' The AT:P metric is the key limiting signal: exploitation carries an attack requirement (a specific condition or race around cache object lifetimes must be met), so reliable weaponization is not guaranteed despite the low complexity. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | A remote, unauthenticated attacker sends requests that cause specially shaped objects and cache fields to be written to and later read from the on-disk cache, triggering the mishandled deserialization and object-lifetime logic. When the corrupted state is reloaded or referenced, the Traffic Server process crashes or enters an inconsistent state, causing a denial of service for all users behind the proxy. … |
| Remediation | Vendor-released patch: upgrade to Apache Traffic Server 9.2.15 (for the 9.x line) or 10.1.4 (for the 10.x line) as documented in the Apache advisory at https://lists.apache.org/thread/5prl9glcm9g2swnq9hqxvnokylm1gr6d. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours: Identify and document all Apache Traffic Server installations and affected versions (8.0.0-8.1.9, 9.0.0-9.2.14, 10.0.0-10.1.3). …
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Same weakness CWE-502 – Deserialization of Untrusted Data
View allSame technique Deserialization
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External POC / Exploit Code
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