CVE-2023-33854Network attack vector

Input manipulation via client-validation bypass

Published Jun 22, 2026 · Updated Jun 22, 2026

Input validation bypass in IBM Db2 Cloud Pak products 4.8 and 5.0 through 5.3 allows remote authenticated users to alter input. Client-side validation can be bypassed through man-in-the-middle techniques, but IBM has not disclosed the affected validation path, request parameter, or server-side handling. Exploitation requires authenticated network access and a high-complexity interception position; the published impact is unauthorized input manipulation, without confidentiality or availability effects.

CVSS severity5.3
Medium
EPSS probability0.25%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Input validation bypass in IBM Db2 Cloud Pak products 4.8 and 5.0 through 5.3 allows remote authenticated users to alter input. Client-side validation can be bypassed through man-in-the-middle techniques, but IBM has not disclosed the affected validation path, request parameter, or server-side handling. Exploitation requires authenticated network access and a high-complexity interception position; the published impact is unauthorized input manipulation, without confidentiality or availability effects.

The record

CVE
CVE-2023-33854
Published
Jun 22, 2026
Updated
Jun 22, 2026
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-294, T1557
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 22, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 22, 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 vectornetwork
Required privilegesauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

5.3IBM CorporationCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:H/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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-294Authentication Bypass by Capture-replay
T1557Adversary-in-the-Middle

Public exploit references

No public exploit references are available in this record.

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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