Public proof of conceptFix available

CVE-2023-20860

Q: Is CVE-2023-20860 actively exploited?

Active exploitation of CVE-2023-20860 has not been confirmed. Its EPSS score was 3.5% on 2026-10-22, the estimated probability of exploitation in the next 30 days.

Q: What is the CVSS score for CVE-2023-20860?

CVE-2023-20860 has a CVSS v3 base score of 7.5 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N.

A public proof of concept exists; no exploitation attested.

Published2023-03-27
Fixed in6.0.7 · 5.3.26

Am I 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

Spring Framework running version 6.0.0 - 6.0.6 or 5.3.0 - 5.3.25 using "**" as a pattern in Spring Security configuration with the mvcRequestMatcher creates a mismatch in pattern matching between Spring Security and Spring MVC, and the potential for a security bypass.

Timeline

dates in UTC

2023-03-2722:15CVE publishedNVD
2026-10-2319:23First public proof of conceptPoC-in-GitHub

Observed activity

isMalicious corpus · updated 2026-10-23 18:48 UTC

Indicators tagged with this CVE, per day0 indicators over 7 days

Block these indicators

Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2023-20860?format=txt
CSV export: https://api.ismalicious.com/edl/cve/CVE-2023-20860?format=csv
TAXII collection of exploited CVEs
The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD

Spring Framework

Branch	Affected	Fixed in	Source
6.0	≥ 6.0.0, < 6.0.7	6.0.7	NVD
5.3	≥ 5.3.0, < 5.3.26	5.3.26	NVD

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Fix

Update Spring Framework to 6.0.7 · 5.3.26

Advisories and patches

spring.ioVendor Advisory

Detection

read 2026-10-23 19:23 UTC

Nuclei template: none so far
Exploit-DB: no entry
Proof-of-concept repositories: 1 repository, unverifiedlimo520/CVE-2023-20860

Sources

CISA-ADPSSVC decisionnone2025-02-19
OpenCVESSVC decisionnone—
CISA-ADPCVSS 3.17.52025-02-19
NVDCVSS 3.17.5read 2026-10-23
FIRST EPSSEPSS score3.5 %2026-10-22
PoC-in-GitHubproof of concept1read 2026-10-23

Technical details

CVSS v3 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Published: 2023-03-27
Last Modified: 2026-06-17
NVD status: Modified

Frequently asked questions

What is CVE-2023-20860?

Is CVE-2023-20860 actively exploited?

Active exploitation of CVE-2023-20860 has not been confirmed. Its EPSS score was 3.5% on 2026-10-22, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2023-20860?

CVE-2023-20860 has a CVSS v3 base score of 7.5 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N.

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