Staging Environment: Content and features may be unstable or change without notice.
Advisory details: github_osv / GHSA-9m3c-qcxr-9x87
Advisory ID github_osv/GHSA-9m3c-qcxr-9x87
Aliases CVE-2026-25854
Summary Apache Tomcat has an Open Redirect vulnerability Occasional URL redirection to untrusted Site ('Open Redirect') vulnerability in Apache Tomcat via the LoadBalancerDrainingValve. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.18, from 10.1.0-M1 through 10.1.52, from 9.0.0.M23 through 9.0.115, from 8.5.30 through 8.5.100. Other, unsupported versions may also be affected Users are recommended to upgrade to version 11.0.20, 10.1.53 or 9.0.116, which fix the issue.
Status Published
Exploitability 0.5
Weighted Severity 6.2
Risk 3.1
Affected and Fixed Packages Package Details
Introduced and Fixed Package Commit Patches Package Commit Patches Details
Weaknesses (1)
CWE-601 URL Redirection to Untrusted Site ('Open Redirect')
System Score Found at
cvssv3.1 6.1 https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/04/GHSA-9m3c-qcxr-9x87/GHSA-9m3c-qcxr-9x87.json
cvssv4 6.9 https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/04/GHSA-9m3c-qcxr-9x87/GHSA-9m3c-qcxr-9x87.json
generic_textual MODERATE
Reference id Reference type URL
https://github.com/apache/tomcat
http://www.openwall.com/lists/oss-security/2026/04/09/21
CVE-2026-25854 https://nvd.nist.gov/vuln/detail/CVE-2026-25854
ghct3b6o74bp2vm7q875s1zh0dqrz3h0 Advisory https://lists.apache.org/thread/ghct3b6o74bp2vm7q875s1zh0dqrz3h0
No exploits are available.

No EPSS data available for this advisory.

Patch URL
There are no known patches.
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N Found at https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/04/GHSA-9m3c-qcxr-9x87/GHSA-9m3c-qcxr-9x87.json
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:L/SI:N/SA:N Found at https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/04/GHSA-9m3c-qcxr-9x87/GHSA-9m3c-qcxr-9x87.json
Attack Vector (AV) Attack Complexity (AC) Attack Requirements (AT) Privileges Required (PR) User Interaction (UI) Vulnerable System Impact Confidentiality (VC) Vulnerable System Impact Integrity (VI) Vulnerable System Impact Availability (VA) Subsequent System Impact Confidentiality (SC) Subsequent System Impact Integrity (SI) Subsequent System Impact Availability (SA)

network

adjacent

local

physical

low

high

none

present

none

low

high

none

passive

active

high

low

none

high

low

none

high

low

none

high

low

none

high

low

none

high

low

none

Vector: SSVCv2/E:N/A:N/T:P/P:M/B:A/M:M/D:T/2026-04-10T18:21:57Z/

Decision: Track

Source URL: https://github.com/cisagov/vulnrichment/blob/develop/2026/25xxx/CVE-2026-25854.json

Source Advisory: vulnrichment/CVE-2026-25854

View SSVC decision tree 
[{'Exploitation': 'none'},
 {'Automatable': 'no'},
 {'Technical Impact': 'partial'},
 {'Mission Prevalence': 'minimal'},
 {'Public Well-being Impact': 'material'},
 {'Mission & Well-being': 'medium'}]