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PatchSiren cyber security CVE debrief

CVE-2026-47027 Oracle Corporation CVE debrief

AI-assisted PatchSiren debrief based on the supplied source corpus. The CVE record was published on 2026-07-21T22:17:08.250Z and has not been modified since then. Vulnerability in Oracle Java SE (component: Libraries) allows unauthenticated network attackers to cause partial denial of service; CVSS 3.1 score 5.3. Affected versions include Oracle Java SE: 8u491, 8u491-perf, 11.0.31, 17.0.19, 21.0.11, 25.0.3, 26.0.1; Oracle GraalVM for JDK: 17.0.19 and 21.0.11; Oracle GraalVM Enterprise Edition: 21.3.18. Successful attacks can result in unauthorized ability to cause a partial denial of service (partial DOS) of Oracle Java SE. Evidence limits suggest focusing on version checks and patch application. Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up. Review the supplied official advisory or CVE record to validate affected scope, severity, and vendor guidance. Plan vendor-supported updates or mitigations through normal change control where exposure is confirmed.

Vendor
Oracle Corporation
Product
Oracle Java SE
CVSS
MEDIUM 5.3
CISA KEV
Not listed in stored evidence
Original CVE published
2026-07-21
Original CVE updated
2026-08-03
Advisory published
2026-07-21
Advisory updated
2026-08-03

Who should care

Teams managing Oracle Java SE and GraalVM instances, especially those internet-exposed, should prioritize patching. This includes operators, platform administrators, vulnerability management teams, and security teams responsible for ensuring the security and integrity of systems utilizing Oracle Java SE and GraalVM.

Technical summary

Vulnerability in Oracle Java SE and GraalVM allows unauthenticated network attackers to cause partial denial of service; CVSS 3.1 score 5.3. The vulnerability affects Oracle Java SE: 8u491, 8u491-perf, 11.0.31, 17.0.19, 21.0.11, 25.0.3, 26.0.1; Oracle GraalVM for JDK: 17.0.19 and 21.0.11; Oracle GraalVM Enterprise Edition: 21.3.18. Successful attacks of this vulnerability can result in unauthorized ability to cause a partial denial of service (partial DOS) of Oracle Java SE.

Defensive priority

Oracle Java SE and GraalVM vulnerability allows unauthenticated network attackers to cause partial denial of service; prioritize patching for internet-exposed instances.

Recommended defensive actions

  • Inventory Oracle Java SE and GraalVM instances for version checks
  • Apply patches for affected versions immediately
  • Restrict network access to Java SE and GraalVM instances
  • Monitor for unusual activity indicating potential exploitation attempts
  • Review compensating controls for exposed systems while remediation is scheduled and verified
  • Check relevant monitoring, detection, and logs for exposed assets that need extra review
  • Track exceptions, retest remediated assets, and close the item only after evidence is documented

Evidence notes

Official CVE and NVD records detail vulnerability in Oracle Java SE and GraalVM; verify affected versions and apply patches. The CVE record was published on 2026-07-21T22:17:08.250Z and has not been modified since then. Evidence limits suggest focusing on version checks and patch application for Oracle Java SE: 8u491, 8u491-perf, 11.0.31, 17.0.19, 21.0.11, 25.0.3, 26.0.1; Oracle GraalVM for JDK: 17.0.19 and 21.0.11; Oracle GraalVM Enterprise Edition: 21.3.18.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-47027 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-47027

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-47027 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-47027

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.