CVE-2026-44598Network attack vector

Authenticated SSRF via forged redirect cookie

Published May 25, 2026 · Updated May 25, 2026

SSRF and open redirect in Apache Shiro Jakarta EE module allow remote authenticated users to trigger server-side GETs via a forged cookie. The post-login flow trusts the client-controlled shiroSavedRequest cookie as a redirect target without validation, causing the server to fetch the supplied URL. Exploitation requires the shiro-jakarta-ee module and valid credentials in 2.0.0-alpha-0 through 2.1.0 or 3.0.0-alpha-0 through 3.0.0-alpha-1; the request can reach server-accessible resources.

CVSS severity5.1
Medium
EPSS probability0.37%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

SSRF and open redirect in Apache Shiro Jakarta EE module allow remote authenticated users to trigger server-side GETs via a forged cookie. The post-login flow trusts the client-controlled shiroSavedRequest cookie as a redirect target without validation, causing the server to fetch the supplied URL. Exploitation requires the shiro-jakarta-ee module and valid credentials in 2.0.0-alpha-0 through 2.1.0 or 3.0.0-alpha-0 through 3.0.0-alpha-1; the request can reach server-accessible resources.

The record

CVE
CVE-2026-44598
Published
May 25, 2026
Updated
May 25, 2026
Vendor
The Apache Software Foundation
Product
Apache Shiro Jakarta EE module
Classifications
CWE-918, CWE-601, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. May 25, 2026CVE publishedPublication date reported by the CVE source.
  2. May 25, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=2.0.0-alpha-0 <=2.1.0
  2. Affected versionversion=3.0.0-alpha-0 <=3.0.0-alpha-1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

The Apache Software Foundation · Apache Shiro Jakarta EE moduleversion=2.0.0-alpha-0 <=2.1.0; version=3.0.0-alpha-0 <=3.0.0-alpha-1

Published CVSS scores

5.4NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
5.1Apache Software FoundationCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:L/VI:N/VA:N/SC:L/SI:N/SA:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-918Server-Side Request Forgery (SSRF)
CWE-601URL Redirection to Untrusted Site ('Open Redirect')
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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