CVE catalog

CVE-2026-56091

When using Apache Shiro with the shiro-guice module in a web servlet context, a specially crafted HTTP request may cause an authentication bypass. This vulnerability is similar to https://www.cve.org

[CVE catalog]

Severity: High · CVSS 8.2CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:P/AU:Y/R:X/V:D/RE:L/U:Amber
Published: Jun 25, 2026, 9:16:46 AM UTC
Source: [NVD] · [CVE record]
EPSS: 0.67% · Oct 25, 2026

When using Apache Shiro with the shiro-guice module in a web servlet context, a specially crafted HTTP request may cause an authentication bypass. This vulnerability is similar to https://www.cve.org/CVERecord?id=CVE-2020-1957 https://www.cve.org/CVERecord , except that it affects the `shiro-guice` module instead of the `shiro-spring` module. This issue affects all Apache Shiro versions through 2.x, and 3.0.0-alpha-1 only when using `shiro-guice` module in a web servlet context. Upgrade to version 3.0.0 or later, which fixes the issue.

Vulnerable and fixed packages

Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.

Distribution	Package	Release	Version	Status
Debian	shiro	sid	`1.3.2-6`	vulnerable
Debian	shiro	forky	`1.3.2-6`	vulnerable
Debian	shiro	trixie	`1.3.2-6`	vulnerable
Debian	shiro	bookworm	`1.3.2-5`	vulnerable
Cpe	shiro	Not reported	Not reported	vulnerable

Fixed-version evidence

Distribution	Package	Type	Release	Fixed version	Urgency	Origin	Bugs
Debian	shiro	source	sid	`(unfixed)`	not yet assigned	Not reported	Not reported
Debian	shiro	source	forky	`(unfixed)`	not yet assigned	Not reported	Not reported
Debian	shiro	source	trixie	`(unfixed)`	not yet assigned	Not reported	Not reported
Debian	shiro	source	bookworm	`(unfixed)`	not yet assigned	Not reported	Not reported

Notes

[trixie] shiro: Minor issue

OpenFactory catalog packages

[Debian 12 (Bookworm)]

[libshiro-java]Affected
Source package: [shiro]
Details (2)
- 1.3.2-5 · all · bookworm
  Affected
  nvd · shiro · debian · bookworm; nvd · shiro · debian · 12
- 1.3.2-5 · all · bookworm
  Affected
  nvd · shiro · debian · bookworm; nvd · shiro · debian · 12

[Debian 13 (Trixie)]

[libshiro-java]Affected
Source package: [shiro]
Details (2)
- 1.3.2-6 · all · trixie
  Affected
  nvd · shiro · debian · 13
- 1.3.2-6 · all · trixie
  Affected
  nvd · shiro · debian · 13

Observed: Oct 23, 2026, 9:45:24 PM UTC

References

[Debian Security Tracker] · [FIRST EPSS] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database]