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Apache Traffic Server EUVDEUVD-2026-50213

| CVE-2026-58160 MEDIUM
Out-of-bounds Read (CWE-125)
2026-07-29 apache GHSA-rx45-8hxf-g37v
Buffer Overflow Apache Information Disclosure Apache Traffic Server
6.3
CVSS 4.0 · Vendor: apache
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Severity by source

Vendor (apache) PRIMARY
6.3 MEDIUM
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/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
vuln.today AI
6.5 MEDIUM

Network-reachable via DNS response channel requiring no authentication; out-of-bounds read yields partial confidentiality and availability impact but no write capability or integrity impact.

3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L
4.0 AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:L/SC:N/SI:N/SA:N

Primary rating from Vendor (apache).

CVSS VectorVendor: apache

CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/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
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
X

Lifecycle Timeline

3
CVSS changed
Jul 29, 2026 - 10:22 NVD
6.5 (MEDIUM) 6.3 (MEDIUM)
Analysis Generated
Jul 29, 2026 - 09:59 vuln.today
CVE Published
Jul 29, 2026 - 08:34 cve.org
MEDIUM 6.5

DescriptionCVE.org

Apache Traffic Server reads out of bounds while parsing DNS answers.

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

Out-of-bounds read in Apache Traffic Server's DNS answer parser (CWE-125) allows unauthenticated remote attackers - or adversaries capable of influencing DNS responses - to leak partial heap memory contents or crash the ATS process, affecting all three active release branches (8.x, 9.x, 10.x). The CVSS 6.5 Medium rating reflects no authentication barrier and no user interaction required, though impact is limited to partial confidentiality and availability loss with no integrity impact. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access
Compromise or spoof DNS resolver serving ATS
Delivery
Craft malformed DNS answer with oversized record data
Exploit
ATS DNS parser reads beyond allocated buffer
Execution
Leak heap memory contents or crash ATS worker process
Impact
Disrupt proxied traffic availability or exfiltrate partial in-memory data
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Vulnerability AssessmentAI

Exploitation No authentication against ATS is required - CVSS PR:N/UI:N confirms this is a zero-interaction, unauthenticated attack path from the ATS process's perspective. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment The CVSS 3.1 vector AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L scores 6.5 (Medium). … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario An attacker who has compromised an upstream DNS resolver, or who can perform DNS spoofing on the network segment between ATS and its resolver, returns a crafted DNS answer with oversized or malformed record data. ATS parses the response and reads beyond the allocated buffer boundary, either leaking heap contents (visible in error logs or crafted response data returned to a client) or crashing the ATS worker process. …
Remediation The primary fix is to upgrade Apache Traffic Server to version 9.2.15 or 10.1.4, as explicitly recommended by the Apache Software Foundation in their advisory at https://lists.apache.org/thread/5prl9glcm9g2swnq9hqxvnokylm1gr6d. … Detailed patch versions, workarounds, and compensating controls in full report.
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More in Apache Traffic Server

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Out-of-bounds write and integer overflow in Apache Traffic Server's MIME and HTTP header parsing lets remote attackers c
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Memory corruption in Apache Traffic Server's remap configuration handling lets remote attackers trigger a use-after-free
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Out-of-bounds memory write in the Apache Traffic Server header_rewrite plugin allows remote attackers to crash the proxy
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Memory corruption in the Cripts scripting framework of Apache Traffic Server (versions 10.0.0 through 10.1.3) allows rem
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Denial of service in Apache Traffic Server (versions 8.0.0-8.1.9, 9.0.0-9.2.14, and 10.0.0-10.1.3) arises from a stack-b
CVE-2026-58178 HIGH
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Denial of service in the Apache Traffic Server ESI (Edge Side Includes) plugin allows remote unauthenticated attackers t

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EUVD-2026-50213 vulnerability details – vuln.today
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