CVE-2023-34034 — Using "**" as a pattern in Spring Security configuration for WebFlux creates a m

Using "**" as a pattern in Spring Security configuration for WebFlux creates a mismatch in pattern matching between Spring Security and Spring WebFlux, and the potential for a security bypass.

01What is this vulnerability?

Using "**" as a pattern in Spring Security configuration for WebFlux creates a mismatch in pattern matching between Spring Security and Spring WebFlux, and the potential for a security bypass.

02Affected products

Vendor	Product	Versions
n	a / Spring Security	Spring Security 6.1.0, Spring Security 6.0.0 , Spring Security 5.8.0, Spring Security 5.7.0 , Spring Security 5.6.0

03Active exploitation status

Not currently listed on the CISA Known Exploited Vulnerabilities (KEV) catalog. EPSS is the best forward-looking signal — see the EPSS row above.

04Recommended remediation

• Patch to a fixed version listed in the vendor advisory (see references below).
• Mitigate with WAF rules, network egress filters, or feature flags where the patch is not yet available.
• Hunt historical logs for exploitation indicators — see Detection signatures below.

05Technical details

For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.

06Detection signatures

Ask SARA in chat to draft a starting detection for this CVE in your stack of choice.

07Related CVEs

No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.

08Timeline

• Published: 2023-07-19T14:16:12.150Z
• Last modified: 2024-10-28T14:40:32.304Z

09References

• spring.io — https://spring.io/security/cve-2023-34034
• security.netapp.com — https://security.netapp.com/advisory/ntap-20230814-0008/