CVE-2026-59954 Apollo ConfigService access key authentication bypass via appId parsing and non-canonical matching
Attackers can bypass authentication to read protected configuration data by exploiting non-canonical appId parsing in Apollo ConfigService.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-59954?
CVE-2026-59954 is a high-severity authentication bypass vulnerability in apolloconfig apollo, published on 15 Jul 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Which versions are affected by CVE-2026-59954?
2 open source packages ship an affected version, including com.ctrip.framework.apollo:apollo.
| Package | Affected | Fixed in |
|---|---|---|
com.ctrip.framework.apollo:apollo Maven | All versions to 2.0.1 | None |
com.ctrip.framework.apollo:apollo Maven | All versions to 2.0.1 | None |
How do I fix CVE-2026-59954?
No fix has been published for CVE-2026-59954 yet. Limit exposure of the affected software until one is available.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2026-59954 being exploited?
There is no known exploitation of CVE-2026-59954 in the wild and no public exploit code.
Sources
Also known as GHSA-4w3q-qpfq-v992.