CVE-2026-57917 Improper Restriction of XML External Entity Reference in proCertum SmartSign
Attackers can trigger SSRF and read local files by crafting signature files that exploit XML External Entity parsing in proCertum SmartSign.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-57917?
CVE-2026-57917 is a medium-severity vulnerability in Asseco proCertum SmartSign, published on 27 Jul 2026. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Official description
proCertum SmartSign parses external XML entities from arbitrary crafted signature files, enabling SSRF and potentially allowing the reading of local files, depending on the parser's configuration. The XML External Entity (XXE) vulnerability is triggered simply by previewing a file in the file selection window, before the victim clicks “Open”.
This issue was fixed in version 9.4.3.90.
Weakness: CWE-611
Which versions are affected by CVE-2026-57917?
How do I fix CVE-2026-57917?
No fix has been published for CVE-2026-57917 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-57917 being exploited?
There is no known exploitation of CVE-2026-57917 in the wild and no public exploit code.
Sources
Also known as GHSA-fqfw-hf3f-2q4c.