MediumVulnerability

CVE-2026-16056: Contest Gallery WordPress plugin exposes OpenAI prompt history

Source: NVD(opens in a new tab)
Identifier: CVE-2026-16056
Published: August 4, 2026
Record updated: October 9, 2026

Known exploitation: Not listed in the CISA Known Exploited Vulnerabilities catalog at the last check.
EPSS: 0.3%

Summary

CVE-2026-16056 affects the Contest Gallery WordPress plugin before 30.0.7. One of its handlers performs no capability or nonce check, so any authenticated user, down to the Subscriber role, can read the site's entire stored OpenAI prompt history. NVD has not yet provided an assessment, and the source is WPScan.

Mitigation

The source does not state a fix yet. Check the original advisory for updates.

Details

Scores and exploitation

EPSS: 0.3%Estimated probability that this CVE is exploited in the next 30 days, from the FIRST Exploit Prediction Scoring System. Read on November 4, 2026.
Disclosure date: August 4, 2026

Affected

Vendors: OpenAI

Classification

Attack type: Data extraction
Attack sophistication: Trivial
AI component targeted: API
Impact: Confidentiality
Labels: security,
privacy

How this record was produced

Summaries, mitigations and labels on this page are generated automatically from the source. The linked source is authoritative. The source gives this advisory a description and no title, so the title above is a headline generated from the source text.

Original source: https://nvd.nist.gov/vuln/detail/CVE-2026-16056

First tracked: August 4, 2026 at 08:08 AM ET, from NVD/CVE Database

Classifier: claude-haiku-5-5, prompt v4

Classifier confidence: 80% (self-assessed)

Summary

Mitigation

Related items