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CVE-2026-49268 Apache Shiro

Affected softwareApache Shiro
Severity8.8 High CVSS 4.0 2 scores
Fixed in2.2.1, 3.0.0-alpha-2
WeaknessCWE-90
Published17 Jun 2026
Updated26 Oct 2026

Description

A remote attacker can inject LDAP special characters into the Distinguished Name (DN) construction in DefaultLdapRealm class. User-supplied username input is directly concatenated into the LDAP DN template without any escaping of RFC 2253 special characters. This allows an attacker to manipulate the DN structure used for LDAP bind authentication, potentially bypassing authentication or impersonating other users. This issue affects all Apache Shiro versions through 2.2.0, and 3.0.0-alpha-1 when using DefaultLdapRealm Upgrade to Apache Shiro 2.2.1 or 3.0.0-alpha-2 or later, which fixes the issue.

Exploitation status

No public exploit

No exploit has been reported in the sources we check. The 2 repositories below are public GitHub repositories with fewer than 5 stars.

  • CISA KEV not listed
  • VulnCheck KEV not listed
  • CISA Vulnrichment exploitation: none
  • Indexed PoC 2 indexed, none at 5+ stars
  • EPSS 0.51% chance in 30 days

2 of these are GitHub repositories with fewer than 5 stars. They are listed for reference and don't count toward the exploitation status above.

IndexArtifactStarsFirst seen
GitHub PoC CVE-2026-49268 — Analysis and Remediation of an LDAP Injection Authentication Bypass Vulnerability 2 2026-08-31
GitHub PoC 扫出你实际装的 Apache Shiro 模块与版本,逐条判定官方 26 条 CVE 里哪些真的落在你身上。按「CVE × 模块」判定,零依赖单 jar。 CVE-2026-49268 2026-08-06

Waratek protection

No exploit published

Within Waratek scope. In the sources we check, nobody has published exploit code for this CVE or reported it being exploited.

A public code fix exists.

  • Protection none
  • Action unverified
  • Review automated Upstream data
  • Record active
Decided by Exploit code for this candidate, published in a reviewed catalogue or a GitHub repository with 5 or more stars, or in use per CISA or VulnCheck; not only a CISA verdict, a forecast, or nothing at all
Finding This CVE is not listed in CISA KEV or VulnCheck KEV, CISA Vulnrichment records no active exploitation, no reviewed exploit catalogue carries an entry for it, and no GitHub PoC repository for it has 5 or more stars. Nobody has published exploit code worth tracing, so it is not a candidate for a rule ahead of the ones where somebody has; an upstream fix path does exist, so the remediation half of the candidacy still holds. This is a statement about what has been published, not about whether the defect is reachable or serious.

CVSS

8.8 HIGH v4.0 CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:H/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:A/V:X/RE:L/U:Red 2 metrics

We show the highest score from the newest CVSS version. Scores from different versions can't be compared, and the first score listed is sometimes a 0.0 placeholder.

VersionScoreBandVectorAssignerType
CVSS 4.0 8.8 HIGH CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:H/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:A/V:X/RE:L/U:Red security@apache.org Secondary published
CVSS 3.1 9.1 CRITICAL CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N NVD Primary

Affected software and releases

Oracle advisories

AdvisoryTypeQuarterProducts Oracle names in its risk matrix
Oracle Critical Patch Update October 2026 ↗ CPU 2026-Q4 Oracle Communications / Core (Apache Shiro) (6.1.1-7.0.0)

Oracle components and versions

FamilyComponentVersions, as Oracle lists themRead as
Oracle Communications Core (Apache Shiro) 6.1.1-7.0.0

Maven packages

Affected and fixed versions, from OSV.dev
PackageIntroducedFixedLast affected
org.apache.shiro:shiro-core 0 2.2.1 unbounded
org.apache.shiro:shiro-core 3.0.0-alpha-0 3.0.0-alpha-2 unbounded

Products and versions

2 products, 4 version entries
SourceVendorProductSchemeAffected versions
nvd apache shiro generic < 2.2.1 · 3.0.0:alpha1
osv org.apache.shiro shiro-core generic < 2.2.1 · ≥ 3.0.0 and < 3.0.0

References

URLTags
https://github.com/apache/shiro PACKAGE
https://lists.apache.org/thread/svszql3od8td7hn6conyj2oq70v53b5s WEB
http://www.openwall.com/lists/oss-security/2026/06/17/8 WEB

Timeline

Published2026-06-17By the CVE Program.
NVD record modified2026-10-26NVD's own last-modified date for this record.