CVE-2021-35940: Apache Portable Runtime

High severity, CVSS 7.1. EPSS: 1.2% chance of exploitation in the next 30 days.

An out-of-bounds array read in the apr_time_exp*() functions was fixed in the Apache Portable Runtime 1.6.3 release (CVE-2017-12613). The fix for this issue was not carried forward to the APR 1.7.x branch, and hence version 1.7.0 regressed compared to 1.6.3 and is vulnerable to the same issue.

Affected products

• Apache Portable Runtime: version 1.7.0 only
• Oracle HTTP Server: version 12.2.1.3.0 only; version 12.2.1.4.0 only

Published 2021-08-23. Last modified 2026-06-17.