Quick answers
- Is CVE-2026-102374 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-102374 being exploited in the wild.
- How severe is CVE-2026-102374?
- Medium severity, with a CVSS score of 6.1, published 29 September 2026.
- Which products and versions are affected?
- GestSup before 3.2.62.
- Is there a fix for CVE-2026-102374?
- 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-2026-102374 attacked?
- It is attacked over the network, in a web application.
- Am I affected by CVE-2026-102374?
- Check whether you run GestSup 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 vulnerability is a stored cross-site scripting (XSS) flaw in the IMAP OAuth connector that improperly handles MIME-encoded email subjects. The application applies HTML escaping first, then double-decodes MIME-encoded words, allowing bypass of XSS protections. Unauthenticated attackers can send crafted emails with nested encoded-words to inject JavaScript that executes when technicians view tickets; no user interaction beyond normal ticket viewing is required to trigger the payload.
Affected products
- GestSup GestSup before 3.2.62
Timeline
- 2026-09-29: disclosed