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Apache APR-util CVE-2026-34501

| EUVDEUVD-2026-53917 HIGH
Heap-based Buffer Overflow (CWE-122)
2026-08-06 apache GHSA-m335-2qh4-r66x
Apache Buffer Overflow Redis Heap Overflow Apache Portable Runtime Utility Red Hat Suse
7.5
CVSS 3.1 · Vendor: apache
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Severity by source

Vendor (apache) PRIMARY
7.5 MEDIUM
AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
vuln.today AI
7.5 HIGH

Network-reachable via rogue Redis server, no auth or complexity required; impact is availability-only heap crash with no confidentiality or integrity effect.

3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
4.0 AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
SUSE
8.2 HIGH
AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H
Red Hat
7.5 MEDIUM
qualitative

Primary rating from Vendor (apache).

CVSS VectorVendor: apache

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

Lifecycle Timeline

5
Analysis Updated
Aug 06, 2026 - 22:41 vuln.today
v2 (cvss_changed)
Re-analysis Queued
Aug 06, 2026 - 22:22 vuln.today
cvss_changed
Severity Changed
Aug 06, 2026 - 22:22 NVD
MEDIUM HIGH
CVSS changed
Aug 06, 2026 - 22:22 NVD
7.5 (MEDIUM) 7.5 (HIGH)
Analysis Generated
Aug 06, 2026 - 16:15 vuln.today

DescriptionCVE.org

Heap-based Buffer Overflow vulnerability in Apache Portable Runtime Utility redis client.

This issue affects Apache Portable Runtime Utility: from 1.6.0 through 1.6.3.

Users are recommended to upgrade to version 1.6.4, which fixes the issue.

AnalysisAI

Heap-based buffer overflow in Apache Portable Runtime Utility's redis client component allows remote unauthenticated attackers to crash applications that use the library, resulting in a denial of service. Affected versions span APR-util 1.6.0 through 1.6.3; version 1.6.4 resolves the issue per Apache's advisory on the oss-security mailing list. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

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Delivery
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Exploit
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Execution
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Vulnerability AssessmentAI

Exploitation Exploitation requires that the target application uses APR-util version 1.6.0-1.6.3 and actively invokes the redis client functionality - applications that link APR-util but do not use its Redis interface are not affected. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment The CVSS 3.1 base score of 7.5 (AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H) reflects a network-exploitable, zero-authentication-required path to a complete availability loss - a straightforward and dangerous profile on paper. … 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 primary remediation is to upgrade Apache Portable Runtime Utility to version 1.6.4, which contains the vendor-confirmed fix as announced at https://lists.apache.org/thread/o8h6c7cq86fplxlnry6c3rn9x0ovq8mv. … Detailed patch versions, workarounds, and compensating controls in full report.
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Recommended ActionAI

Within 24 hours, inventory all deployed instances of APR-util to identify systems running versions 1.6.0 through 1.6.3. …

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Threat intelligence, references, and detailed analysis are available after sign-in.

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Same weakness CWE-122 – Heap-based Buffer Overflow

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Vendor StatusVendor

SUSE

Severity: Important
Product Status
SUSE Linux Enterprise Desktop 15 SP7 Affected
SUSE Linux Enterprise High Performance Computing 12 Not-Affected
SUSE Linux Enterprise High Performance Computing 15 SP7 Affected
SUSE Linux Enterprise Module for Basesystem 15 SP7 Affected
SUSE Linux Enterprise Module for Server Applications 15 SP7 Affected

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CVE-2026-34501 vulnerability details – vuln.today
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