CVE-2023-0833Public exploit

Credential disclosure via echoed invalid header values

Published Sep 27, 2023 · Updated Jun 23, 2026

Information disclosure in OkHttp before 4.9.2 in Red Hat AMQ Streams allows local users to read secrets from invalid-header exceptions. Header-value validation throws an IllegalArgumentException whose message includes the complete rejected value, including Authorization or Proxy-Authorization credentials. Local users need low privileges and access to the resulting exception or logs; exposed values can include reusable authentication material.

CVSS severity4.7
Medium
EPSS probability0.44%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Information disclosure in OkHttp before 4.9.2 in Red Hat AMQ Streams allows local users to read secrets from invalid-header exceptions. Header-value validation throws an IllegalArgumentException whose message includes the complete rejected value, including Authorization or Proxy-Authorization credentials. Local users need low privileges and access to the resulting exception or logs; exposed values can include reusable authentication material.

The record

CVE
CVE-2023-0833
Published
Sep 27, 2023
Updated
Jun 23, 2026
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-209, T1552
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 27, 2023CVE publishedPublication date reported by the CVE source.
  2. Jun 23, 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?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

5.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
4.7Red Hat, Inc.CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A: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.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-209Generation of Error Message Containing Sensitive Information
T1552Unsecured Credentials

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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