Is CVE-2026-116823 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-116823 being exploited in the wild.

How severe is CVE-2026-116823?

Medium severity, with a CVSS score of 6.1, published 27 October 2026.

How is CVE-2026-116823 attacked?

It is attacked over the network.

Am I affected by CVE-2026-116823?

Check whether you run YesWiki 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.

CVE-2026-116823: YesWiki reflected cross-site scripting in Bazar field rendering

CVE-2026-116823 · Severity: medium · CVSS 6.1 · Published 2026-10-27

YesWiki is a wiki collaboration platform. An unauthenticated attacker can inject malicious JavaScript into a page by crafting a URL with query parameters matching missing form field names. When a victim visits the link, the script executes in their browser with access to their authenticated session, allowing the attacker to perform actions on their behalf or steal page content.

Technologies: YesWiki. Vendors: YesWiki.

Quick answers

Is CVE-2026-116823 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-116823 being exploited in the wild.
How severe is CVE-2026-116823?: Medium severity, with a CVSS score of 6.1, published 27 October 2026.
Which products and versions are affected?: YesWiki before 4.7.0.
Is there a fix for CVE-2026-116823?: Yes: fixed in 4.7.0. Until then: Remove or restrict the $_REQUEST fallback in BazarField::getValue() to prevent unsanitized query parameters from reaching Twig templates with the |raw filter enabled. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-116823 attacked?: It is attacked over the network.
Am I affected by CVE-2026-116823?: Check whether you run YesWiki 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.

How to fix

Fixed in: 4.7.0

Remove or restrict the $_REQUEST fallback in BazarField::getValue() to prevent unsanitized query parameters from reaching Twig templates with the |raw filter enabled.

Technical details

BazarField::getValue() in tools/bazar/fields/BazarField.php falls back to reading unsanitized $_REQUEST values when an entry's stored JSON lacks a field key. These values are rendered through Twig templates with the |raw filter enabled, which bypasses auto-escaping. An unauthenticated attacker can craft a URL with a query parameter matching a missing Bazar field name to inject reflected JavaScript that executes in the victim's browser.

Affected products

YesWiki YesWiki before 4.7.0

Timeline

2026-10-12: disclosed
2026-10-27: advisory

References

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