CVE-2026-77883Network attack vectorHinoki check available

Information disclosure via one-hop JEXL property navigation

Published Sep 14, 2026 · Updated Sep 14, 2026

Information disclosure in Apache Syncope allows remote authenticated users to read sensitive LinkedAccount or Manager data through JEXL. The JexlContextBuilder name denylist checks only the first property in a JEXL path, so one-hop navigation reaches linked-account or manager objects and their sensitive fields. Exploitation requires one administrator with Derived Schema entitlements to store the expression and another administrator with User read entitlements to evaluate it; exposed data can include hashed credentials.

CVSS severityUnavailable
Unscored
EPSS probability0.38%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Information disclosure in Apache Syncope allows remote authenticated users to read sensitive LinkedAccount or Manager data through JEXL. The JexlContextBuilder name denylist checks only the first property in a JEXL path, so one-hop navigation reaches linked-account or manager objects and their sensitive fields. Exploitation requires one administrator with Derived Schema entitlements to store the expression and another administrator with User read entitlements to evaluate it; exposed data can include hashed credentials.

The record

CVE
CVE-2026-77883
Published
Sep 14, 2026
Updated
Sep 14, 2026
Vendor
The Apache Software Foundation
Product
Apache Syncope
Classifications
CWE-202, T1213
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Sep 14, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 14, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=3.0.0-M0 <=3.0.16
  2. Affected versionversion=4.0.0-M0 <=4.0.7
  3. Affected versionversion=4.1.0-M0 <=4.1.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

The Apache Software Foundation · Apache Syncopeversion=3.0.0-M0 <=3.0.16; version=4.0.0-M0 <=4.0.7; version=4.1.0-M0 <=4.1.2

Published CVSS scores

No CVSS assessment is available in this record.

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-202Exposure of Sensitive Information Through Data Queries
T1213Data from Information Repositories

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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