Detections
Analytics

Echo: org.apache.shiro:shiro-core: security update to 2.1.0

low Tenable Cloud Security Plugin ID 463667

Description

There are packages installed that are affected by a vulnerability referenced in the following CVE:

 - Observable Timing Discrepancy vulnerability in Apache Shiro. This issue affects Apache Shiro: from 1.*,
 2.* before 2.0.7. Users are recommended to upgrade to version 2.0.7 or later, which fixes the issue. Prior
 to Shiro 2.0.7, code paths for non-existent vs. existing users are different enough, that a brute-force
 attack may be able to tell, by timing the requests only, determine if the request failed because of a non-
 existent user vs. wrong password. The most likely attack vector is a local attack only. Shiro security
 model https://shiro.apache.org/security-model.html#username_enumeration discusses this as well. Typically,
 brute force attack can be mitigated at the infrastructure level. (CVE-2026-23901)

Solution

Update the org.apache.shiro:shiro-core library and its related packages to version 2.1.0 or later.

See Also

https://advisory.echohq.com/cve/CVE-2026-23901

Plugin Details

Severity: Low

ID: 463667

Version: Revision 1.1

Type: Local

Published: 10/2/2026

Updated: 10/2/2026

Risk Information

VPR

Risk Factor: Low

Score: 1.2

Percentile: 0.01

CVSS v2

Risk Factor: Low

Base Score: 1

Temporal Score: 0.7

Vector: CVSS2#AV:L/AC:H/Au:S/C:P/I:N/A:N

CVSS Score Source: CVE-2026-23901

CVSS v3

Risk Factor: Low

Base Score: 2.5

Temporal Score: 2.2

Vector: CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

CVSS v4

Risk Factor: Low

Base Score: 1

Threat Score: 0.1

Threat Vector: CVSS:4.0/E:U

Vector: CVSS:4.0/AV:L/AC:H/AT:P/PR:L/UI:A/VC:L/VI:N/VA:N/SC:L/SI:N/SA:N

Vulnerability Information

Exploit Ease: No known exploits are available

Patch Publication Date: 9/28/2026

Vulnerability Publication Date: 2/10/2026

Reference Information

CVE: CVE-2026-23901