Quick answers
- Is CVE-2026-91867 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-91867 being exploited in the wild.
- How severe is CVE-2026-91867?
- Medium severity, with a CVSS score of 4.3, published 21 September 2026.
- Which products and versions are affected?
- Apache Neethi before 3.2.4.
- Is there a fix for CVE-2026-91867?
- No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
- How is CVE-2026-91867 attacked?
- It is attacked over the network, in a software library.
- Am I affected by CVE-2026-91867?
- Check whether you run Apache Neethi at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
Technical details
Neethi lacks a total timeout for remote policy reference fetches; it only enforces per-read timeouts. An attacker can send bytes at an extremely slow rate to keep the socket open indefinitely, tying up the calling thread and eventually exhausting available threads. This is a denial of service via thread exhaustion that requires only network-level access to a host making policy fetch requests.
Affected products
- Apache Neethi before 3.2.4
Timeline
- 2026-09-21: disclosed