CVE-2026-72544 OpenSignLabs OpenSign - Insufficient Verification of Data Authenticity
Unauthenticated attackers can forge document audit-trail entries in OpenSign by supplying arbitrary viewer identity and IP parameters, compromising legal non-repudiation.
- 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-2026-72544?
CVE-2026-72544 is a high-severity missing authorization vulnerability in OpenSignLabs OpenSign, published on 11 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
An integrity verification vulnerability in OpenSignLabs OpenSign through 2.37.0 allows unauthenticated remote attackers to forge document audit-trail entries via the triggerevent Parse cloud function. The function accepts viewer identity and IP address as caller-supplied parameters without authentication, allowing fabrication of arbitrary audit log entries. An attacker can tamper with the legal audit trail of any signed document, undermining non-repudiation.
Weakness: CWE-345
Which versions are affected by CVE-2026-72544?
How do I fix CVE-2026-72544?
No fix has been published for CVE-2026-72544 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-72544 being exploited?
There is no known exploitation of CVE-2026-72544 in the wild and no public exploit code.
Sources
Also known as GHSA-7j6v-hchx-rmq3.