High severity · published Jul 15, 2026
CVE-2026-59954
Apollo ConfigService access key authentication bypass via appId parsing and non-canonical matching
7.5
CVSS
0.6%
EPSS
No
On KEV
Description
Apollo is a reliable configuration management system suitable for microservice configuration management scenarios. Prior to 2.5.2, Apollo ConfigService may allow unauthorized access to configuration data when AccessKey or management key authentication is enabled because ConfigService can accept a non-canonical appId variant during authentication while downstream request handling resolves it to the protected app, including accent variants under accent-insensitive collations or trailing-space variants under PAD SPACE collations on /configs and /configfiles endpoints. This issue is fixed in version 2.5.2.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
None
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.6% · higher than 47% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
AP
apollo · apolloconfig
< 2.5.2 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-59954
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-59954
github.com
https://github.com/apolloconfig/apollo/commit/310809d557e01c6803051736cd525e333ffe00ec
github.com
https://github.com/apolloconfig/apollo/releases/tag/v2.5.2
github.com
https://github.com/apolloconfig/apollo/security/advisories/GHSA-4w3q-qpfq-v992
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