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CVE-2026-87785

Apache Syncope: JWT subject spoofing

cve-program · severity unknownCVSS unknownCheck source for fixed versionsKEV status unknown

Original advisory

cve-program · CVE-2026-87785

Published

Authentication bypass by spoofing vulnerability in Apache Syncope. When the configured JWKS settings for internal JWT authentication are disclosed (at least protocol and key), an attacker can spoof another user's privileges after completing a successful authentication and obtaining a valid JWT. This issue affects Apache Syncope: from 3.0.0-M0 through 3.0.16, from 4.0.0-M0 through 4.0.7, from 4.1.0-M0 through 4.1.2. Users are recommended to upgrade to version 4.0.8 / 4.1.3, which fix this issue.

Read the publisher's advisory

Affected versions, risk and source history

cve-program · CVE-2026-87785

Published

org.apache.syncope.core:syncope-core-spring

https://repo.maven.apache.org/maven2

Publisher's version information

Shown as published. These rules are not interpreted as NuGet package version ranges.

{
                    "vendor": "Apache Software Foundation",
                    "product": "Apache Syncope",
                    "collectionURL": "https://repo.maven.apache.org/maven2",
                    "packageName": "org.apache.syncope.core:syncope-core-spring",
                    "packageURL": "pkg:maven/org.apache.syncope.core/syncope-core-spring",
                    "versions": [
                        {
                            "status": "affected",
                            "version": "3.0.0-M0",
                            "lessThanOrEqual": "3.0.16",
                            "versionType": "semver"
                        },
                        {
                            "status": "affected",
                            "version": "4.0.0-M0",
                            "lessThanOrEqual": "4.0.7",
                            "versionType": "semver"
                        },
                        {
                            "status": "affected",
                            "version": "4.1.0-M0",
                            "lessThanOrEqual": "4.1.2",
                            "versionType": "semver"
                        }
                    ],
                    "defaultStatus": "unaffected"
                }

Original source record · Cite this exact observation · Complete original publisher JSON