CVE-2026-59955: Apollo Authentication Bypass Vulnerability
HIGHCVE-2026-59955 is a HIGH (CVSS 7.5) authentication bypass vulnerability (CWE-287: Improper Authentication) affecting Apollo libraries in the Maven ecosystem. The issue involves apollo configservice access key authentication bypass via raw config file appid parsing. Remediation is available in the latest vendor maintenance releases.
CVE-2026-59955 at a Glance
Security Impact
CVSS: 7.5
The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N).
How to Fix CVE-2026-59955
To remediate this vulnerability, upgrade all affected Apollo dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.
<dependency>
<groupId>com.ctrip.framework.apollo</groupId>
<artifactId>apollo</artifactId>
<version>Latest secure release</version>
</dependency>Run the following command in your project directory to verify that all resolved dependencies use the patched release:
mvn dependency:tree -Dincludes=com.ctrip.framework.apolloHow to Check if You Are Affected
To determine whether your Java application is affected by CVE-2026-59955, inspect your build dependencies using the Maven Dependency Plugin:
mvn dependency:tree -Dincludes=com.ctrip.framework.apolloAnalyze the terminal output to locate any version of Apollo in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than the patched release), your application is affected.
Note: The mvn dependency:tree -Dincludes=com.ctrip.framework.apollo command inspects the resolved dependency graph declared in your project's POM files; it does not perform automated security scanning or inspect runtime dynamic classpaths. Always verify runtime container classpaths and shaded JARs.
Technical Details
Vulnerability Mechanism & Technical Analysis
This vulnerability is classified under CWE-287: Improper Authentication, where when an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct. In Apollo, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.
Source Advisory Statement
CVE-2026-59955 Affected Apollo Versions
1 component(s)| Product / Package | Ecosystem | Affected Versions | Fixed Version |
|---|---|---|---|
|
com.ctrip.framework.apollo:apollo
|
Maven |
|
|
References
Frequently Asked Questions
What is CVE-2026-59955?
Which Apollo versions are affected?
What version fixes CVE-2026-59955?
Is apollo affected?
What is the CVSS score of CVE-2026-59955?
What CWE is associated with CVE-2026-59955?
How can I check Maven dependencies for CVE-2026-59955?
Machine-readable OSV JSON
OSV v1.5 Schema
{
"schema_version" : "1.4.0",
"id" : "GHSA-h4pc-58cc-hc95",
"modified" : "2026-07-20T19:16:36Z",
"published" : "2026-07-13T18:37:14Z",
"aliases" : [ "CVE-2026-59955" ],
"summary" : "Apollo ConfigService access key authentication bypass via raw config file appId parsing",
"details" : "### Summary\nApollo ConfigService may allow unauthorized access to raw configuration data when AccessKey / management key authentication is enabled because authentication parsed the appId incorrectly for the raw config file endpoint.\n\n### Details\nRequests under /configfiles/raw/{appId}/{clusterName}/{namespace} were parsed for authentication as appId \"raw\" instead of the actual path appId. ConfigService used the parsed appId to look up available AccessKey secrets before verifying the request signature.\n\nIf no AccessKey is configured for an application literally named \"raw\", ConfigService may treat the request as having no available secrets and allow it to continue without signature verification, even when AccessKey / management key authentication is enabled for the actual target appId in the path.\n\n### Impact\nAn unauthenticated remote attacker may read raw configuration data from affected ConfigService endpoints when AccessKey / management key authentication is enabled for the target app and the attacker requests the raw config file endpoint.\n\n### Affected endpoints\nThe primary impact is on ConfigService raw config file reads under /configfiles/raw/{appId}/{clusterName}/{namespace}.\n\n### Status\nFixed in Apollo 2.5.2. Users should upgrade to Apollo 2.5.2 or later.\n\n### Related advisory\nThe non-canonical appId matching issue is tracked separately in GHSA-4w3q-qpfq-v992 so each independently fixable vulnerability can receive its own CVE.",
"severity" : [ {
"type" : "CVSS_V3",
"score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N"
} ],
"affected" : [ {
"package" : {
"ecosystem" : "Maven",
"name" : "com.ctrip.framework.apollo:apollo"
},
"ranges" : [ {
"type" : "ECOSYSTEM",
"events" : [ {
"introduced" : "0"
} ]
} ],
"database_specific" : {
"last_known_affected_version_range" : "< 2.5.2"
}
} ],
"references" : [ {
"type" : "WEB",
"url" : "https://github.com/apolloconfig/apollo/security/advisories/GHSA-h4pc-58cc-hc95"
}, {
"type" : "ADVISORY",
"url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-59955"
}, {
"type" : "WEB",
"url" : "https://github.com/apolloconfig/apollo/commit/310809d557e01c6803051736cd525e333ffe00ec"
}, {
"type" : "PACKAGE",
"url" : "https://github.com/apolloconfig/apollo"
}, {
"type" : "WEB",
"url" : "https://github.com/apolloconfig/apollo/releases/tag/v2.5.2"
} ],
"database_specific" : {
"cwe_ids" : [ "CWE-20", "CWE-287" ],
"severity" : "HIGH",
"github_reviewed" : true,
"github_reviewed_at" : "2026-07-13T18:37:14Z",
"nvd_published_at" : "2026-07-15T17:16:51Z"
}
}