Quick answers
- Is CVE-2026-87398 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-87398 being exploited in the wild.
- How severe is CVE-2026-87398?
- High severity, with a CVSS score of 7.5, published 20 October 2026.
- Which products and versions are affected?
- Oracle Outside In Technology 8.5.8.
- Is there a fix for CVE-2026-87398?
- 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-2026-87398 attacked?
- It is attacked over the network, in a software library.
- Am I affected by CVE-2026-87398?
- Check whether you run Oracle Outside In Technology 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
A denial-of-service vulnerability in Oracle Outside In Core (version 8.5.8) allows unauthenticated attackers to crash or hang the service through a low-complexity HTTP request with no special privileges required. The vulnerability is network-accessible and requires no user interaction or authentication, making it easily exploitable. A successful attack results in complete availability loss (DoS).
Affected products
- Oracle Outside In Technology 8.5.8
Timeline
- 2026-10-20: disclosed