CVE-2023-34034
A public proof of concept exists; no exploitation attested.
- Published2023-07-19
- Fixed in6.1.2 · 6.0.5 · 5.8.5 · 5.7.10 · 5.6.12
- WeaknessCWE-281
Am I affected?
Debian, Ubuntu or Red Hat sometimes backport a fix without changing the upstream version number: such a version reads « to verify », never « affected ».With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.
Description
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.
Timeline
dates in UTC- 2023-07-1915:15CVE publishedNVD
- 2026-10-2319:23First public proof of conceptPoC-in-GitHub
Observed activity
isMalicious corpus · updated 2026-10-23 21:37 UTCBlock these indicators
- Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2023-34034?format=txt
- CSV export: https://api.ismalicious.com/edl/cve/CVE-2023-34034?format=csv
- TAXII collection of exploited CVEs
- The EDL and CSV take an API key on the Pro plan.
Versions per branch
NVD · OSV| Branch | Affected | Fixed in | Source |
|---|---|---|---|
| 6.1 | ≥ 6.1.0, < 6.1.2 | 6.1.2 | NVD · OSV |
| 6.0 | ≥ 6.0.0, < 6.0.5 | 6.0.5 | NVD · OSV |
| 5.8 | ≥ 5.8.0, < 5.8.5 | 5.8.5 | NVD · OSV |
| 5.7 | ≥ 5.7.0, < 5.7.10 | 5.7.10 | NVD · OSV |
| 5.6 | ≥ 5.6.0, < 5.6.12 | 5.6.12 | NVD · OSV |
as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.
Distribution builds and vendor advisories
Packages from OSV.dev and products from the vendors' CSAF advisories.
version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.
Vendor advisories
Red Hat Security Advisory: Red Hat Fuse 7.12.1 release and security update
Fix
- Update Vmware spring security to 6.1.2 · 6.0.5 · 5.8.5 · 5.7.10 · 5.6.12
- Vendor fix Red Hat Product Security RHSA-2023:7247 · 1 productBefore applying the update, back up your existing installation, including all applications, configuration files, databases and database settings, and so on. The References section of this erratum contains a download link (you must log in to download the update).
- Workaround from the vendor Red Hat Product Security RHSA-2023:7247 · 1 productUsers of path-based URL determination should ensure that all their patterns have a slash prepended. example: pathMatchers("home/**") // vulnerable pathMatchers("/home/**") // not vulnerable
Advisories and patches
- spring.ioVendor Advisory
Detection
read 2026-10-23 19:23 UTC- Nuclei template
- none so far ProjectDiscovery
- Exploit-DB
- no entry Exploit-DB
Sources
- CISA-ADPSSVC decisionnone2026-04-30
- OpenCVESSVC decisionnone—
- CNACVSS 3.19.1read 2026-10-23
- NVDCVSS 3.19.8read 2026-10-23
- CISA-ADPweakness (CWE)CWE-2812024-10-28
- FIRST EPSSEPSS score4.1 %2026-10-23
- PoC-in-GitHubproof of concept1read 2026-10-23
- OSVaffected packages—
Technical details
- CVSS v3 Vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- Published
- 2023-07-19
- Last Modified
- 2026-06-17
- NVD status
- Modified
Frequently asked questions
What is CVE-2023-34034?
Is CVE-2023-34034 actively exploited?
What is the CVSS score for CVE-2023-34034?
Running Red Hat Fuse 7.12.1 release? Hear about its next vulnerability
Surveillance reads the versions in your stack — a domain, a lockfile or a list — checks each CVE against the ranges its sources publish, and alerts you when one you run is exploited or enters CISA KEV. A version it cannot read stays « version not verified ».
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Go further
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Related vulnerabilities
Same product first, then the same vendor advisory and the same publication week.