CVE-2026-77646 Server Side Request Forgery (SSRF) vulnerability reported in Windchill
Attackers can exploit SSRF via deserialization in PTC Windchill and FlexPLM to access internal resources or bypass security controls.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-77646?
CVE-2026-77646 is a high-severity server-side request forgery vulnerability in PTC FlexPLM, published on 20 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
A Server-Side Request Forgery (SSRF) vulnerability has been reported in PTC Windchill PDMLink and PTC FlexPLM. The vulnerability may be exploited through the deserialization of untrusted data.
Which versions are affected by CVE-2026-77646?
How do I fix CVE-2026-77646?
No fix has been published for CVE-2026-77646 yet. Limit exposure of the affected software until one is available.
Upgrade, and send outbound requests through an allow-list that blocks internal addresses. More about Server-side request forgery.
Is CVE-2026-77646 being exploited?
There is no known exploitation of CVE-2026-77646 in the wild and no public exploit code.
Sources
Also known as GHSA-2698-qwmx-3r6f.