A remote takeover of an Oracle enterprise product (JDeveloper) enables full system compromise; Oracle is widely deployed and this impacts development infrastructure used across organizations.
CVE-2026-83423
Remote takeover of Oracle JDeveloper via HTTP by low-privileged attacker
Is CVE-2026-83423 being exploited?
Not confirmed. CVE-2026-83423 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked. EPSS currently estimates a 0.42% probability of exploitation in the next 30 days.
How severe is CVE-2026-83423?
CVE-2026-83423 is rated High with a CVSS score of 8.8. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-83423?
Not known from our data. No patch reference has been recorded for CVE-2026-83423, which is not the same as no patch existing — a fix may have shipped without a tagged reference, or after this record was written. The vendor advisory is the only authority on whether a fix exists, and mitigations may be available regardless.
What does CVE-2026-83423 affect?
CVE-2026-83423 affects Oracle JDeveloper 12.2.1.4.0, Oracle JDeveloper 14.1.2.0.0. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-83423?
Apply Oracle patch immediately; if unavailable, block/limit JDeveloper HTTP access
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Remote compromise of Oracle JDeveloper via HTTP by a low-privileged attacker, resulting in full confidentiality, integrity, and availability loss.
Immediate action required
- affected12.2.1.4.0
- affected14.1.2.0.0
As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.
cisa ssvc
- exploitation
- none
- automatable
- no
- technical impact
- total
Assessed by CISA 17 Sept 2026 (SSVC 2.0.3).
timeline
- 15 Sept 2026Published
- 17 Sept 2026Analysed by vulneraibility.com · 2 days later
- 17 Sept 2026CISA SSVC assessment: exploitation none · same day later
- 17 Sept 2026CVE record last updated · same day later
- Advisoryoracle.com /security-alerts/cspusep2026.html
sources
- CVE List (CVE.org): description, affected versions, references; CVE Terms of Use
- NVD: CVSS and CPE data
- CISA Vulnrichment (ADP): SSVC decision points
- FIRST EPSS: exploit probability and percentile
- Summary, impact and triage tags: written by our AI analysis pipeline from the sources above. Check them against the sources.