Quick answers
- Is CVE-2026-42657 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-42657 being exploited in the wild.
- How severe is CVE-2026-42657?
- Medium severity, with a CVSS score of 5.3, published 15 June 2026.
- Which products and versions are affected?
- Contest Gallery <= 28.1.7.
- Is there a fix for CVE-2026-42657?
- No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
- How is CVE-2026-42657 attacked?
- It is attacked over the network, in a software library.
- Am I affected by CVE-2026-42657?
- Check whether you run Contest Gallery at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
Technical details
The Contest Gallery plugin for WordPress (versions up to and including 28.1.7) is vulnerable to an improper validation of specified quantity in input (CWE-1284). This issue allows a remote, unauthenticated attacker to submit malformed or unexpected numerical values through network requests. According to the CVSS vector, the attack has low complexity, requires no privileges, and no user interaction. The primary impact is on integrity (I:L), meaning an attacker could potentially modify certain data points or plugin behaviors related to quantity processing, though it does not grant access to sensitive information or impact service availability.
Affected products
- Contest Gallery Contest Gallery <= 28.1.7
Timeline
- 2026-06-15: disclosed
- 2026-06-15: advisory