# CVE-2026-75105: phpIPAM Temporary Subnet Share Information Disclosure via Address Parameter

> Unauthenticated attackers with a valid temporary share token can enumerate subnet IDs to read sensitive IP address records across all subnets.

- **Severity:** High 8.7 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 17 Aug 2026
- **Updated:** 24 Sep 2026
- **Also known as:** GHSA-rvhc-g4r6-x86w

## What is CVE-2026-75105?

CVE-2026-75105 is a high-severity missing authorization vulnerability in phpipam, published on 17 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

phpIPAM through 1.8.1 fails to verify that a requested IP address belongs to the subnet a temporary share token was issued for. In app/temp_share/index.php and app/temp_share/address.php, when the share type is 'subnets', the subnetId parameter is used directly as a database primary key to fetch an address without confirming the address belongs to the authorized subnet. An unauthenticated party holding any valid, non-expired temporary share URL can enumerate the subnetId parameter to read every IP address record across all sections and subnets, including hostnames, DNS names, MAC addresses, owner/contact fields, and notes (which may contain credentials and configuration details).

Weakness: CWE-639 (Authorization Bypass Through User-Controlled Key)

## Which versions are affected by CVE-2026-75105?


## How do I fix CVE-2026-75105?

No fix has been published for CVE-2026-75105 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-75105 being exploited?

There is no known exploitation of CVE-2026-75105 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-75105 and fix it if it is affected.

What it is: CVE-2026-75105 is a high-severity missing authorization vulnerability in phpipam, published on 17 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-2026-75105 in the wild and no public exploit code.

Affected product: phpipam. 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-2026-75105/ (Markdown: https://insights.sbomify.com/CVE-2026-75105/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-75105
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-75105
- OSV: https://osv.dev/vulnerability/CVE-2026-75105

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-75105/
Summaries are generated and may contain mistakes; the official description above is the record.