CVE-2026-16056Public exploitNetwork attack vector

Subscriber-level prompt history disclosure via unchecked AJAX handler

Published Aug 4, 2026 · Updated Aug 4, 2026

Missing authorization in Contest Gallery before 30.0.7 allows remote authenticated users to read stored OpenAI prompt history. The post_cg_get_openai_prompts AJAX handler returns every row of the private prompt table without a capability or nonce check. Any authenticated role, including Subscriber, can paginate the response to disclose prompts, revisions, model settings, and related metadata.

CVSS severity4.3
Medium
EPSS probability0.16%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Missing authorization in Contest Gallery before 30.0.7 allows remote authenticated users to read stored OpenAI prompt history. The post_cg_get_openai_prompts AJAX handler returns every row of the private prompt table without a capability or nonce check. Any authenticated role, including Subscriber, can paginate the response to disclose prompts, revisions, model settings, and related metadata.

The record

CVE
CVE-2026-16056
Published
Aug 4, 2026
Updated
Aug 4, 2026
Vendor
Wasiliy Strecker / ContestGallery developer
Product
Contest Gallery
Classifications
CWE-862, T1213
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 4, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 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=0 <30.0.7

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Wasiliy Strecker / ContestGallery developer · Contest Galleryversion=0 <30.0.7

Published CVSS scores

4.3CISA-ADPCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/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 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 exploitPublished

Weakness, pattern, technique

CWE-862Missing Authorization
T1213Data from Information Repositories

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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