CVE-2026-47891
Spring Framework maxInMemorySize Bypassed in Jaxb2Decoder
Description
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
INFO
Published Date :
Aug. 27, 2026, 6:17 a.m.
Last Modified :
Sept. 2, 2026, 5:36 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | |||||
| CVSS 3.1 | CRITICAL | 134c704f-9b21-4f2e-91b3-4a467353bcc0 |
Solution
- Update Spring Framework to a version that includes the fix.
- Reconfigure XML parsing limits if applicable.
- Validate XML input processing.
- Test application functionality.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-47891.
| URL | Resource |
|---|---|
| https://spring.io/security/cve-2026-47891 | Vendor Advisory |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-47891 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-47891
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-47891 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-47891 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
Initial Analysis by [email protected]
Sep. 02, 2026
Action Type Old Value New Value Added CPE Configuration OR *cpe:2.3:a:vmware:spring_framework:*:*:*:*:*:*:*:* versions from (including) 6.2.0 up to (excluding) 6.2.20 *cpe:2.3:a:vmware:spring_framework:*:*:*:*:*:*:*:* versions from (including) 6.1.0 up to (excluding) 6.1.29 *cpe:2.3:a:vmware:spring_framework:*:*:*:*:*:*:*:* versions from (including) 5.3.0 up to (excluding) 5.3.50 *cpe:2.3:a:vmware:spring_framework:*:*:*:*:*:*:*:* versions from (including) 6.0.0 up to (excluding) 6.0.31 *cpe:2.3:a:vmware:spring_framework:*:*:*:*:*:*:*:* versions up to (excluding) 5.2.26 *cpe:2.3:a:vmware:spring_framework:*:*:*:*:*:*:*:* versions from (including) 7.0.0 up to (excluding) 7.0.8.1 Added Reference Type VMware: https://spring.io/security/cve-2026-47891 Types: Vendor Advisory -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Aug. 27, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Added CWE CWE-770 Added SSVC {'id': 'CVE-2026-47891', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'none'}, {'automatable': 'yes'}, {'technicalImpact': 'total'}], 'version': '2.0.3', 'timestamp': '2026-08-27T14:52:02.361152Z'} -
New CVE Received by [email protected]
Aug. 27, 2026
Action Type Old Value New Value Added Description 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 Added Affected New affected value received. <a href="https://github.com/CVEProject/cvelistV5/blob/main/cves/2026/47xxx/CVE-2026-47891.json">CVE-2026-47891</a> Added Reference https://spring.io/security/cve-2026-47891