CVE-2026-15819 IBM CVE debrief

Who should care

Defenders responsible for IBM DataPower Gateway deployments, especially for versions 10.5.0.0 through 10.5.0.22, 10.6.1 through 10.6.6, 10.6.0.0 through 10.6.0.10, and 11.0.0.0 through 11.0.0.2, should assess potential exposure and impact.

Why it matters

Defenders should prioritize verifying exposure and assessing potential impact on DataPower Gateway deployments due to the out-of-bounds write vulnerability, which could lead to denial of service attacks.

• Potential denial of service attacks
• Need to verify exposure and assess impact on DataPower Gateway deployments
• Priority on applying patches or updates if available

Technical summary

IBM DataPower Gateway is vulnerable to an out-of-bounds write attack due to a strict-weak-ordering violation in a sorting comparator. This could allow a remote attacker to cause a denial of service. The vulnerability affects DataPower Gateway versions 10.5.0.0 through 10.5.0.22, 10.6.1 through 10.6.6, 10.6.0.0 through 10.6.0.10, and 11.0.0.0 through 11.0.0.2. Defenders should prioritize verifying exposure and assessing potential impact on DataPower Gateway deployments. Limited information is available on potential exploitation or impact.

Defensive priority

Defenders should prioritize verifying exposure and assessing potential impact on DataPower Gateway deployments, especially for versions 10.5.0.0 through 10.5.0.22, 10.6.1 through 10.6.6, 10.6.0.0 through 10.6.0.10, and 11.0.0.0 through 11.0.0.2.

Recommended defensive actions

• Verify DataPower Gateway version and check for exposure
• Assess potential impact on deployments
• Apply patches or updates if available
• Monitor for potential denial of service attacks
• Review compensating controls for exposed systems
• Check relevant monitoring, detection, and logs for exposed assets
• Track exceptions and retest remediated assets

Evidence notes

The CVE record and source item provide details on the vulnerability, but limited information is available on potential exploitation or impact. Defenders should verify exposure and assess potential impact on DataPower Gateway deployments, especially for versions 10.5.0.0 through 10.5.0.22, 10.6.1 through 10.6.6, 10.6.0.0 through 10.6.0.10, and 11.0.0.0 through 11.0.0.2. Evidence is limited, and further verification is required.

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.