# CVE-2026-83354: Oracle Coherence unauthorized data access vulnerability

Source: https://junglewise.ai/threats/cve-2026-83354-oracle-coherence-unauthorized-data-access-vulnerability  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-09-15. Updated: 2026-09-26  
License: CC BY 4.0 with a link back

CVE-2026-83354 · Severity: medium · CVSS 6.3 · Published 2026-09-15

Oracle Coherence is an in-memory data grid product used by enterprises to cache and manage critical application data. A vulnerability in the Core component allows a low-privileged network attacker to gain unauthorized access to sensitive data stored in Coherence, potentially exposing customer information and confidential business records. The vulnerability can also impact other Oracle products that depend on Coherence.

Technologies: [Oracle Coherence](https://junglewise.ai/threats/technologies/coherence). Vendors: [Oracle](https://junglewise.ai/threats/vendors/oracle).

## Quick answers

**Is CVE-2026-83354 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-83354 being exploited in the wild.

**How severe is CVE-2026-83354?** Medium severity, with a CVSS score of 6.3, published 15 September 2026.

**Which products and versions are affected?** Oracle Coherence 15.1.1.0.0.

**Is there a fix for CVE-2026-83354?** 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-2026-83354 attacked?** It is attacked over the network.

**Am I affected by CVE-2026-83354?** Check whether you run Oracle Coherence 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

This is a difficult-to-exploit confidentiality vulnerability in Oracle Coherence Core (version 15.1.1.0.0) that requires low privileges and network access via HTTP. The attack has a high complexity factor (AC:H) but no user interaction requirement. Successful exploitation grants an attacker unauthorized access to critical data or complete read access to all data accessible through Oracle Coherence. The vulnerability has scope change implications, meaning the impact extends beyond the Coherence product itself to dependent systems. Patches are expected from Oracle's regular security update channels.

## Affected products

- Oracle Coherence 15.1.1.0.0

## Timeline

- 2026-09-15: disclosed

## References

- [https://www.oracle.com/security-alerts/cspusep2026.html](https://www.oracle.com/security-alerts/cspusep2026.html)

## Related threats

- [Oracle Coherence partial denial of service via HTTP](https://junglewise.ai/threats/cve-2026-83416-oracle-coherence-partial-denial-of-service-via-http)
- [Oracle Coherence privilege escalation via HTTP](https://junglewise.ai/threats/cve-2026-83415-oracle-coherence-privilege-escalation-via-http)
- [Oracle Coherence information disclosure in Core component](https://junglewise.ai/threats/cve-2026-83414-oracle-coherence-information-disclosure-in-core-component)
- [Oracle Coherence integrity bypass in Core](https://junglewise.ai/threats/cve-2026-83413-oracle-coherence-integrity-bypass-in-core)
- [Oracle Coherence unauthorized data access vulnerability](https://junglewise.ai/threats/cve-2026-83412-oracle-coherence-unauthorized-data-access-vulnerability)