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9.8
CVE-2026-47891: Spring Framework may let oversized XML bypass memory limit
CVE-2026-47891 · published 7 days ago
Summary
Web applications built with Spring that use the Aalto XML parser can accept XML data larger than the intended in‑memory size limit. This can cause the program to consume more memory than planned, potentially leading to slower performance or crashes. Upgrade Spring to a version that fixes the check or switch to a different XML parser to enforce size limits.
What to do
The CVE record does not list a fixed version. Check the vendor's site or the advisory links below - a fix may already be released.
Affected software
| Ecosystem | Vendor | Product | Affected versions |
|---|---|---|---|
| Ubuntu:Pro:18.04:LTS | canonical | libspring-java | All versions |
| Ubuntu:Pro:20.04:LTS | canonical | libspring-java | All versions |
| Ubuntu:Pro:22.04:LTS | canonical | libspring-java | All versions |
| Ubuntu:Pro:24.04:LTS | canonical | libspring-java | All versions |
| Ubuntu:26.04:LTS | canonical | libspring-java | All versions |
| – | spring | spring framework | <= 7.0.8 |
| Ubuntu:Pro:14.04:LTS | canonical | libspring-java | All versions |
| Ubuntu:Pro:16.04:LTS | canonical | libspring-java | All versions |
Original advisory text
A Spring WebFlux application that relies on the Aalto XML processor to parse XML input does not correctly enforce the maxInMemorySize limit.
Spring Framework 7.0.0 - 7.0.8
Spring Framework 6.2.0 - ...
A Spring WebFlux application that relies on the Aalto XML processor to parse XML input does not correctly enforce the maxInMemorySize limit.
Spring Framework 7.0.0 - 7.0.8
Spring Framework 6.2.0 - 6.2.19
Spring Framework 6.1.0 - 6.1.28
Spring Framework 6.0.0 - 6.0.30
Spring Framework 5.3.0 - 5.3.49
Spring Framework 5.2.25.RELEASE and earlier
Spring Framework 7.0.0 - 7.0.8
Spring Framework 6.2.0 - 6.2.19
Spring Framework 6.1.0 - 6.1.28
Spring Framework 6.0.0 - 6.0.30
Spring Framework 5.3.0 - 5.3.49
Spring Framework 5.2.25.RELEASE and earlier
References
- https://spring.io/security/cve-2026-47891
- https://ubuntu.com/security/CVE-2026-47891 Third Party Advisory
- https://www.cve.org/CVERecord?id=CVE-2026-47891 Third Party Advisory
Severity
9.8
Critical
CVSS 3.1: 9.8 (OSV)
Exploitation
EPSS <1%
Type
CWE-770Allocation of Resources Without Limits
Timeline
Published27 Aug 2026
Updated2 Sep 2026
First seen27 Aug 2026
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