CVE-2026-42333Public exploitNetwork attack vector

Credential leakage via slash-consuming path placeholder matching

Published May 9, 2026 · Updated May 9, 2026

Credential exposure in Quarkiverse Quarkus OpenAPI Generator before 2.11.1-lts, 2.16.0-lts, or 2.17.0 allows attackers to receive credentials. The runtime authentication path matcher turns each path placeholder into a greedy wildcard, so one parameter consumes slashes and matches a different same-method operation. Reachability requires generated-client use with overlapping same-method paths; bearer tokens, API keys, or basic credentials then reach lower-trust endpoints.

CVSS severity6.3
Medium
EPSS probability0.40%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Credential exposure in Quarkiverse Quarkus OpenAPI Generator before 2.11.1-lts, 2.16.0-lts, or 2.17.0 allows attackers to receive credentials. The runtime authentication path matcher turns each path placeholder into a greedy wildcard, so one parameter consumes slashes and matches a different same-method operation. Reachability requires generated-client use with overlapping same-method paths; bearer tokens, API keys, or basic credentials then reach lower-trust endpoints.

The record

CVE
CVE-2026-42333
Published
May 9, 2026
Updated
May 9, 2026
Vendor
Quarkiverse
Product
Quarkus OpenAPI Generator
Classifications
CWE-200
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 9, 2026CVE publishedPublication date reported by the CVE source.
  2. May 9, 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=< 2.11.1-lts
  2. Affected versionversion=< 2.16.0-lts
  3. Affected versionversion=< 2.17.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Quarkiverse · Quarkus OpenAPI Generatorversion=< 2.11.1-lts; version=< 2.16.0-lts; version=< 2.17.0

Published CVSS scores

6.3GitHubCVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-200Exposure of Sensitive Information to an Unauthorized Actor

Public exploit references

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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