CVE-2026-34501: Apache Portable Runtime Utility: Heap buffer overflow in APR redis client
CSIRTS triage
- What
- The APR Redis client contains a heap buffer overflow vulnerability in command or response processing.
- Who is affected
- Applications using Apache APR Utility with Redis backends.
- Urgency
- High severity (CVSS 7.5); heap overflow can lead to remote code execution in Redis client scenarios.
- Action
- Update Apache Portable Runtime Utility to a patched version that fixes heap buffer handling in the Redis client.
AI-assisted analysis generated from the source advisory — verify against the original.
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Details
Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-34501
Exploitation outlook
EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.
- Low exploitation riskCVE-2026-345010.53% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 42% of all EPSS-scored CVEs.
Referenced CVEs
| CVE | CSIRTS overview | External |
|---|---|---|
| CVE-2026-34501 | coverage & exploitation status | NVD · CVE.org |
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