CVE-2026-11944 openSIS Classic 9.3 - Authenticated path traversal in SentMail attachment download
Authenticated attackers can read arbitrary server files via path traversal in openSIS Classic's sent-mail attachment download feature.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-11944?
CVE-2026-11944 is a medium-severity path traversal vulnerability in Os4ed Opensis, published on 14 Jul 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
openSIS Classic 9.3 contains an authenticated path traversal vulnerability in the legacy messaging sent-mail attachment download functionality that allows an authenticated attacker to read arbitrary files on the server via crafted path traversal sequences.
Weakness: CWE-22
Which versions are affected by CVE-2026-11944?
It affects 1 product.
Products include Os4ed Opensis.
How do I fix CVE-2026-11944?
No fix has been published for CVE-2026-11944 yet. Limit exposure of the affected software until one is available.
Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.
Is CVE-2026-11944 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-11944 exists.
Other vulnerabilities in Os4ed Opensis
Sources
Also known as GHSA-5v7m-6h74-672r.