CVE-2026-13257 IBM DataPower Gateway Insufficient Verification of Data Authenticity

What is CVE-2026-13257?

CVE-2026-13257 is a medium-severity vulnerability in Ibm Datapower Gateway, published on 8 Oct 2026. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

IBM DataPower Gateway 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 could allow an authenticated user to forge signature requests due to improper verification of data authenticity.

Weakness: CWE-345

Which versions are affected by CVE-2026-13257?

It affects 1 product.

Products include Ibm Datapower Gateway.

How do I fix CVE-2026-13257?

No fix has been published for CVE-2026-13257 yet. Limit exposure of the affected software until one is available.

Is CVE-2026-13257 being exploited?

There is no known exploitation of CVE-2026-13257 in the wild and no public exploit code.

Other vulnerabilities in Ibm Datapower Gateway

• CVE-2026-14269 IBM DataPower Gateway Buffer Overflow Critical 9.8
• CVE-2026-14502 IBM DataPower Gateway Improper Authentication Critical 9.8
• CVE-2026-14991 IBM DataPower Gateway Out-of-bounds Write Critical 9.8
• CVE-2026-14992 IBM DataPower Gateway Out-of-bounds Write Critical 9.8
• CVE-2026-15762 IBM DataPower Gateway Out-of-bounds Write Critical 9.8

All Ibm Datapower Gateway vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-3558-f8gc-mcgw.