# CVE-2026-42657: WordPress Contest Gallery plugin <= 28.1.7 - Other Vulnerability Type vulnerability

> Unauthenticated vulnerability in Contest Gallery plugin allows attackers to exploit unspecified flaws, requiring immediate plugin updates.

- **Severity:** Medium 6.5 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 15 Jun 2026
- **Updated:** 16 Jun 2026
- **Also known as:** GHSA-pvw3-j77v-26w9

## What is CVE-2026-42657?

CVE-2026-42657 is a medium-severity vulnerability in Wasiliy Strecker Contest Gallery, published on 15 Jun 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Unauthenticated Other Vulnerability Type in Contest Gallery <= 28.1.7 versions.

Weakness: CWE-1284 (Improper Validation of Specified Quantity in Input)

## Which versions are affected by CVE-2026-42657?


## How do I fix CVE-2026-42657?

No fix has been published for CVE-2026-42657 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-42657 being exploited?

There is no known exploitation of CVE-2026-42657 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-42657 and fix it if it is affected.

What it is: CVE-2026-42657 is a medium-severity vulnerability in Wasiliy Strecker Contest Gallery, published on 15 Jun 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-42657 in the wild and no public exploit code.

Affected product: Wasiliy Strecker Contest Gallery. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-42657/ (Markdown: https://insights.sbomify.com/CVE-2026-42657/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-42657
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-42657
- OSV: https://osv.dev/vulnerability/CVE-2026-42657

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-42657/
Summaries are generated and may contain mistakes; the official description above is the record.