# CVE-2026-23901: Apache Shiro Affected by an Observable Timing Discrepancy Vulnerability

Source: https://junglewise.ai/threats/cve-2026-23901-apache-shiro-affected-by-an-observable-timing-discrepancy  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-02-10  
License: CC BY 4.0 with a link back

CVE-2026-23901 · Severity: medium · CVSS 4 · Published 2026-02-10

Apache Shiro Affected by an Observable Timing Discrepancy Vulnerability

Technologies: [org.apache.shiro:shiro-core (Maven)](https://junglewise.ai/threats/technologies/org-apache-shiro-shiro-core). Vendors: [Maven](https://junglewise.ai/threats/vendors/maven).

## Quick answers

**Is CVE-2026-23901 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-23901 being exploited in the wild.

**How severe is CVE-2026-23901?** Medium severity, with a CVSS score of 4, published 10 February 2026.

**Which products and versions are affected?** org.apache.shiro:shiro-core (Maven) ECOSYSTEM:introduced=0,fixed=2.1.0.

**Is there a fix for CVE-2026-23901?** Yes. org.apache.shiro:shiro-core (Maven): upgrade to 2.1.0 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**Am I affected by CVE-2026-23901?** Check whether you run org.apache.shiro:shiro-core (Maven) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## How to fix

- org.apache.shiro:shiro-core (Maven): upgrade to 2.1.0 or later

  ```sh
  # set org.apache.shiro:shiro-core to 2.1.0 in your pom.xml or build.gradle
  ```


## Affected products

- org.apache.shiro:shiro-core (Maven) ECOSYSTEM:introduced=0,fixed=2.1.0

## Identifiers

- CVE-2026-23901
- GHSA-c4qc-4q9p-m9q9

## Related threats

- [Apache Shiro authentication bypass via RememberMe cookie replay](https://junglewise.ai/threats/cve-2026-56130-apache-shiro-authentication-bypass-via-rememberme-cookie-replay)
- [Apache Shiro LDAP injection in DefaultLdapRealm](https://junglewise.ai/threats/cve-2026-49268-apache-shiro-ldap-injection-in-defaultldaprealm)
- [Apache Shiro session fixation in default configuration](https://junglewise.ai/threats/cve-2026-43827-apache-shiro-session-fixation-in-default-configuration)
- [Apache Shiro vulnerable to path traversal](https://junglewise.ai/threats/cve-2023-46749-apache-shiro-vulnerable-to-path-traversal)
- [Apache Shiro Authentication Bypass vulnerability](https://junglewise.ai/threats/cve-2022-40664-apache-shiro-authentication-bypass-vulnerability)