CVE-2026-11747 Reflected XSS in Seres Software's syWEB
Reflected XSS in Seres Software syWEB allows attackers to inject scripts, but the product is unsupported and end-of-life.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-11747?
CVE-2026-11747 is a medium-severity cross-site scripting vulnerability in Seres Software syWEB, published on 27 Aug 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
Improper neutralization of input during web page generation ('cross-site scripting') vulnerability in Seres Software syWEB allows Reflected XSS.
This issue affects syWEB: through 27082026. NOTE: The vendor was contacted and it was learned that the product is not supported.
Weakness: CWE-79
Which versions are affected by CVE-2026-11747?
How do I fix CVE-2026-11747?
No fix has been published for CVE-2026-11747 yet. Limit exposure of the affected software until one is available.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2026-11747 being exploited?
There is no known exploitation of CVE-2026-11747 in the wild and no public exploit code.
Sources
Also known as GHSA-5qh6-895j-vpwx.