CVE-2026-40991

XML External Entity (XXE) injection when documenting untrusted XML content

MEDIUM

5.9

CVSS Score

Published: June 9, 2026 at 11:46 PM UTC

Updated: July 23, 2026 at 07:32 PM UTC

2 products affected across 2 vendorsSpring Rest DocsSpring REST Docs

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Severity

MEDIUM5.9

Exploit prediction

EPSS 0.2%

SSVC

No known exploit

Description

When using spring-restdocs-webtestclient or spring-restdocs-restassured to document a remote API accessed over HTTP, an attacker who compromises the API or tricks the user into documenting a malicious API can perform an XXE injection attack when the documentation-generating tests are next executed. Affected versions: Spring REST Docs 4.0.0; 3.0.0 through 3.0.5; 2.0.0.RELEASE through 2.0.8.RELEASE.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Spring Rest Docs · Broadcom

95%

2.0.0 ≤ v < 2.0.93.0.0 ≤ v < 3.0.5.14.0.0

Affected range stops below 2.0.9, so it looks safe — our inference, not a vendor statement

Affected range stops below 3.0.5.1, so it looks safe — our inference, not a vendor statement

Spring REST Docs · Spring

60%

2.0.0.RELEASE ≤ v < 2.0.9.RELEASE3.0.0 ≤ v < 3.0.5.14.0.0 ≤ v < 4.0.0.12.0.0.RELEASE 3.0.0 4.0.0

Affected range stops below 2.0.9.RELEASE, so it looks safe — our inference, not a vendor statement

Affected range stops below 3.0.5.1, so it looks safe — our inference, not a vendor statement

Affected range stops below 4.0.0.1, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

https://spring.io/security/cve-2026-40991

References (1)

Vendor Advisory

Source: cverecord

https://spring.io/security/cve-2026-40991

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

5.9MEDIUMvmware

Attack Vector: NETWORK
Complexity: HIGH
Privileges: NONE
User Interaction: REQUIRED
Scope: UNCHANGED
Confidentiality: HIGH
Integrity: NONE
Availability: LOW

Vector?

Quick Info

StatusANALYZED

CWE

CWE-611

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