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CVE-2026-15037: XML injection vulnerability in QDom comment, CDATA and processing-instruction serialization

CVE-2026-15037 is a vulnerability in XML injection vulnerability in QDom comment, CDATA and processing-instruction serialization, rated Low by Microsoft. Microsoft has not reported exploitation in the wild. The EPSS model estimates a 0.44% probability of exploitation activity in the next 30 days, higher than 39% of all scored vulnerabilities. Microsoft released the fix on 6 August 2026, outside Patch Tuesday. It affects 1 product in 1 product family (Open Source Software).

Key facts

CVE ID
CVE-2026-15037
Severity
N/A
Microsoft severity
Low
Exploited in the wild
No
Publicly disclosed
No
Weakness
CWE-91
EPSS
0.44% (percentile 39%)
CISA KEV
Not listed
Released
Last updated
Patch Tuesday
July 2026 Patch Tuesday
Product families
Open Source Software

Affected products (1)

Open Source Software

ProductSecurity updateTypeFixed buildRestart
azl3 qtbase 6.6.3-5 on Azure Linux 3.0CBL-Mariner ReleasesSecurity Update6.6.3-5No

NIST NVD data

NVD status
Deferred
NVD CVSS
2.9 (LOW)
NVD weakness
CWE-91
Published to NVD
NVD last modified

References

Revision history

VersionDateDescription
1.0Information published.

Sources