9.8

CVE-2026-53421: apache software foundation apache syncope

CVSS: 9.8v3.1CriticalAnalyzed
Published 20-07-2026Last modified 21-07-2026
Open JSON

Vulnerability summary

CVE-2026-53421 is a critical (CVSS 9.8) vulnerability in apache software foundation apache syncope. EPSS estimates a 1.14% chance of exploitation in the next 30 days, higher than 66% of scored vulnerabilities.

Overall risk
70/100
0100
High · default modelHow is this calculated?
CVSS score
9.8/10
010
Critical · v3.1 (CVE.org)
EPSS score
1.14%
0%100%
Low · +0.46 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 20-07-2026
    PublishedVulnerability first disclosed.
  2. 21-07-2026
    Last modifiedVulnerability information updated.

Description

Improper Isolation or Compartmentalization vulnerability in Apache Syncope. An administrator with adequate entitlements can achieve remote code execution through the connector subsystem by relying on scripted connectors' (REST and SQL) capability to run Groovy scripts. This issue affects Apache Syncope: from 3.0.0-M0 through 3.0.16, from 4.0.0-M0 Through 4.0.6, from 4.1.0-M0 through 4.1.1. Users are recommended to upgrade to version 4.0.7 / 4.1.2, which fix this issue by hardening the Groovy security sandbox.

CVSS metrics

2 scores · 2 sources · 1 version

EPSS trend

Probability

1.14%

Chance of exploitation in the next 30 days

Percentile

66%

Versus all other CVEs

30-day change

+0.46 pp

From 0.68% on 18-09-2026

18-09-202618-10-2026
EPSS score
1.14%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Apache1 product
  • syncope≥ 3.0.0, ≤ 3.0.16 | ≥ 4.0.0, < 4.0.7 | ≥ 4.1.0, < 4.1.2
Apache software foundation1 product
  • apache syncope≥ 3.0.0-M0, ≤ 3.0.16 | ≥ 4.0.0-M0, ≤ 4.0.6 | ≥ 4.1.0-M0, ≤ 4.1.1

2 vendors · 2 products

References

2 links