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VulnerabilityPublished Updated

CVE-2026-50559: quarkusio quarkus · Improper Authentication

Affects quarkusio quarkusSource CVE Database V5

0

Mentioned vulnerabilities

Public exploit available · CVSS 7.5 High · fixed in 3.36.3 : patch quarkusio quarkus as a priority.

Data as of 26 Oct 2026, 14:05 UTC

CVSS 3.1 base score
7.5High
How severe the flaw is on the 0–10 CVSS scale.
EPSS
1.0% chance of exploitation in 30 days – higher than 63% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
CISA SSVC
Exploitation
Proof of concept is public or traded
Automatable
Attackers can reliably automate steps 1–4 of the kill chain
Technical impact
Limited control over the software or limited information exposure

CISA SSVC assessment, 2026-06-22.

Patch
Available – fixed in 3.36.3, 3.33.2.1, 3.27.4.1 +1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Exploitation evidence

t = 0 is the CVE’s publication on cve.org

  1. Disclosed: evidence found.

    CVE published 19 Jun 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponised: evidence found.

    CISA SSVC: proof of concept public

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

Timeline

  1. CVE ID reserved

    by GitHub, Inc.

    , 15 days before disclosure

  2. CVE published

    on cve.org

    , t = 0

  3. CISA SSVC assessment

    proof of concept public

    , 3 days after disclosure

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), CISA SSVC, the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.

What to do

Upgrade quarkusio quarkus to 3.36.3, 3.33.2.1, 3.27.4.1 or 3.20.6.2.

Affected software

ProductAffectedFixed in
quarkusioquarkusAffected
  • >=3.36.0 <3.36.3
Fixed in
  • 3.36.3
quarkusioquarkusAffected
  • >=3.33.0 <3.33.2.1
Fixed in
  • 3.33.2.1
quarkusioquarkusAffected
  • >=3.27.0 <3.27.4.1
Fixed in
  • 3.27.4.1
quarkusioquarkusAffected
  • <3.20.6.2
Fixed in
  • 3.20.6.2

Description

Quarkus is a Java framework for building cloud-native applications. Prior to versions 3.37.0, 3.36.3, 3.33.2.1, 3.33.3, 3.27.4.1, 3.27.5, and 3.20.6.2, Quarkus HTTP path-based authorization policies can be bypassed using encoded semicolons (%3B) to smuggle matrix parameters past the security layer, and using encoded slashes (%2F) or backslashes (%5C) to access protected static resources. This is a distinct issue from CVE-2026-39852, which addressed only literal semicolon stripping. Versions 3.37.0, 3.36.3, 3.33.2.1, 3.33.3, 3.27.4.1, 3.27.5, and 3.20.6.2 contain a patch.

References

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