CVE-2026-44598: With valid login credentials, URL Redirection to Untrusted Site ('Open Redirect'), Server-Side Request Forgery

Routine

MEDIUM 5.4WATCHLISTUPGRADE

CVE-2026-44598 is a medium-severity flaw (CVSS 5.4) affecting shiro. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

With valid login credentials, URL Redirection to Untrusted Site ('Open Redirect'), Server-Side Request Forgery (SSRF) vulnerability in Apache Shiro. This issue affects Apache Shiro from 2.0-alpha to 2.1.0, and 3.0.0-alpha-1, only when using shiro-jakarta-ee integration module. Users are recommended to upgrade to version 2.1.1, or 3.0.0-alpha-2 or later, which fixes the issue by encrypting the cookie. After successful login, Jakarta EE integ

Why this priority

On your watchlist

A fixed release or distro patch exists.

Risk facts

CVSS score	5.4 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	Required
EPSS exploit chance	0.4% (top 70%)
CISA exploited list	No
Weakness	CWE-601, CWE-918
Published	2026-05-25
Last modified	2026-07-24

Publisher (CNA): Apache Software Foundation · Vendor: apache

Last updated 2026-07-24 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-05-25 21:16 UTCPublished CVE record published
2026-07-24 10:10 UTCUpdated Record last modified

apache shiro UPGRADE

Affected: >= 2.0.0 and < 2.1.1 · 3.0.0 alpha1

Fixed in: 2.1.1

Safe to downgrade to: a release before 2.0.0

1. Check installed version

apt-cache policy shiro || rpm -q shiro || shiro --version

2. UPGRADE to 2.1.1 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade shiro

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade shiro

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

3. If no update is available yet, DOWNGRADE to a release before 2.0.0 (Debian / Ubuntu)

apt-cache madison shiro sudo apt install shiro=<VERSION_BEFORE_2.0.0> sudo apt-mark hold shiro

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list shiro sudo dnf downgrade shiro-<VERSION_BEFORE_2.0.0> sudo dnf versionlock add shiro

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-44598?

shiro: upgrade to 2.1.1. Exact commands for each OS are on this page.

Is CVE-2026-44598 being exploited?

CVE-2026-44598 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-44598 affect?

CVE-2026-44598 affects shiro. Severity is medium (CVSS 5.4). With valid login credentials, URL Redirection to Untrusted Site ('Open Redirect'), Server-Side Request Forgery (SSRF) vulnerability in Apache Shiro. This issue affects Apache Shiro from 2.0-alpha to 2.1.0, and 3.0.0-alpha-1, only when u

How urgent is CVE-2026-44598?

Priority 32/100. On your watchlist

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References

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