CVE-2026-100387 pgpointcloud CVE debrief

Who should care

Defenders responsible for PostgreSQL databases using the pgPointcloud extension should assess exposure and prioritize patching or mitigation. This includes operators, platform administrators, vulnerability management teams, and security teams who need to review the vulnerability and implement controls to prevent exploitation. The vulnerability allows authenticated database users to read adjacent heap memory, which can be used to exfiltrate data or crash

Why it matters

CVE-2026-100387 is a high-severity vulnerability in pgPointcloud that allows authenticated database users to read adjacent heap memory. Defenders should prioritize patching or mitigating this vulnerability, especially in systems where authenticated database users have access to the pgPointcloud extension.

• Data exfiltration through crafted pcpatch values
• Potential crashes of the PostgreSQL backend
• Need for verification of affected versions and remediation

Technical summary

The vulnerability is caused by a heap out-of-bounds read in the dimensional patch WKB deserialization process. Authenticated database users can supply crafted pcpatch values with attacker-controlled size fields to copy heap memory into stored patches for exfiltration or crash the PostgreSQL backend. The vulnerability affects pgPointcloud, a PostgreSQL extension for working with point cloud data. Defenders should prioritize patching or mitigating this vulnerability, especially in systems where authenticated database users have access to the pgPointcloud extension. The CVE record and NVD entry provide details on the vulnerability, and additional information may be needed to fully assess the impact.

Defensive priority

Defenders should prioritize patching or mitigating this vulnerability, especially in systems where authenticated database users have access to the pgPointcloud extension.

Recommended defensive actions

• Patch or upgrade pgPointcloud to a version that fixes the vulnerability
• Restrict access to the pgPointcloud extension to trusted users only
• Monitor database logs for suspicious activity
• 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
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up

Evidence notes

The vulnerability is caused by a heap out-of-bounds read in the dimensional patch WKB deserialization process. The CVE record and NVD entry provide details on the vulnerability, but additional information may be needed to fully assess the impact.

Sources and 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.