Quick answers
- Is CVE-2026-108559 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-108559 being exploited in the wild.
- How severe is CVE-2026-108559?
- Medium severity, with a CVSS score of 6.1, published 11 November 2026.
- Which products and versions are affected?
- Revive-Adserver Revive Adserver 6.0.8 and earlier.
- Is there a fix for CVE-2026-108559?
- Yes: fixed in Revive Adserver 6.0.9. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
- How is CVE-2026-108559 attacked?
- It is attacked over the network.
- Am I affected by CVE-2026-108559?
- Check whether you run Revive-Adserver Revive Adserver 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: Revive Adserver 6.0.9
Technical details
A reflected XSS vulnerability exists in the iframe invocation options where frame_width and frame_height parameters are inserted into HTML attributes without proper encoding. An unauthenticated attacker can craft a malicious URL that injects JavaScript, which executes when an authenticated user visits the link. The vulnerability requires user interaction (visiting the malicious URL) and affects the invocation-tag generation for any-size zones.
Affected products
- Revive Adserver Revive Adserver 6.0.8 and earlier
Timeline
- 2026-11-11: disclosed