# CVE-2026-72548: OpenSignLabs OpenSign - Information Disclosure

> Unauthenticated attackers can retrieve any organization's tenant configuration data via the gettenant Parse cloud function, exposing sensitive information.

- **Severity:** High 7.5 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 11 Aug 2026
- **Updated:** 11 Aug 2026
- **Also known as:** GHSA-5w47-3cxw-fxxf

## What is CVE-2026-72548?

CVE-2026-72548 is a high-severity 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 information disclosure vulnerability in OpenSignLabs OpenSign through 2.37.0 allows unauthenticated remote attackers to retrieve any organisation tenant record via the gettenant Parse cloud function. The function accepts a contactId parameter and returns the full tenant record without authentication or authorization checks. An attacker can enumerate and disclose tenant configuration data for any organisation in the system.

Weakness: CWE-200 (Exposure of Sensitive Information to an Unauthorized Actor)

## Which versions are affected by CVE-2026-72548?


## How do I fix CVE-2026-72548?

No fix has been published for CVE-2026-72548 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-72548 being exploited?

There is no known exploitation of CVE-2026-72548 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-72548 and fix it if it is affected.

What it is: CVE-2026-72548 is a high-severity 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.
Exploitation: There is no known exploitation of CVE-2026-72548 in the wild and no public exploit code.

Affected product: OpenSignLabs OpenSign. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-72548/ (Markdown: https://insights.sbomify.com/CVE-2026-72548/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-72548
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-72548
- OSV: https://osv.dev/vulnerability/CVE-2026-72548

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From sbomify Insights: https://insights.sbomify.com/CVE-2026-72548/
Summaries are generated and may contain mistakes; the official description above is the record.