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CVE-2026-41003

Unencoded HTML Outputs in Spring Security May Allow Cross-Site Scripting

MEDIUM
5.4
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 SecuritySpring Security

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Severity
MEDIUM5.4
Exploit prediction
EPSS 0.2%
SSVC
No known exploit

Description

An attacker able to influence values in RelyingPartyRegistration may be able to run arbitrary code on HTML forms generated by Spring Security filters. Affected versions: Spring Security 5.7.0 through 5.7.23; 5.8.0 through 5.8.25; 6.3.0 through 6.3.16; 6.4.0 through 6.4.16; 6.5.0 through 6.5.10; 7.0.0 through 7.0.5.

Affected

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

Spring Security· VMware
95%
5.7.0 ≤ v < 5.7.245.8.0 ≤ v < 5.8.266.3.0 ≤ v < 6.3.176.4.0 ≤ v < 6.4.176.5.0 ≤ v < 6.5.10.27.0.0 ≤ v < 7.0.5.1
Affected range stops below 5.7.24, so it looks safe — our inference, not a vendor statement
Affected range stops below 5.8.26, so it looks safe — our inference, not a vendor statement
Affected range stops below 6.3.17, so it looks safe — our inference, not a vendor statement
Affected range stops below 6.4.17, so it looks safe — our inference, not a vendor statement
Affected range stops below 6.5.10.2, so it looks safe — our inference, not a vendor statement
Affected range stops below 7.0.5.1, so it looks safe — our inference, not a vendor statement
Spring Security· Spring
60%
5.7.0 ≤ v < 5.7.245.8.0 ≤ v < 5.8.266.3.0 ≤ v < 6.3.176.4.0 ≤ v < 6.4.176.5.0 ≤ v < 6.5.10.27.0.0 ≤ v < 7.0.5.15.7.05.8.06.3.06.4.06.5.07.0.0
Affected range stops below 5.7.24, so it looks safe — our inference, not a vendor statement
Affected range stops below 5.8.26, so it looks safe — our inference, not a vendor statement
Affected range stops below 6.3.17, so it looks safe — our inference, not a vendor statement
Affected range stops below 6.4.17, so it looks safe — our inference, not a vendor statement
Affected range stops below 6.5.10.2, so it looks safe — our inference, not a vendor statement
Affected range stops below 7.0.5.1, 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

References (1)

Vendor Advisory
Source: cverecord
https://spring.io/security/cve-2026-41003

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

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

CVSS

5.4MEDIUM[email protected]
Attack Vector
NETWORK
Complexity
LOW
Privileges
LOW
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality
LOW
Integrity
LOW
Availability
NONE
Vector?

Quick Info

StatusANALYZED
CWE
CWE-79

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