# CVE-2026-106072: A flaw in Node.js TLS hostname verification allows a certificate with only a DNS SAN to authenticate an IP endpoint when the client connects


- **Severity:** Medium 6.7 (`CVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:L`)
- **Exploited in the wild:** Not known
- **Fix available:** Yes
- **Published:** 23 Oct 2026
- **Updated:** 23 Oct 2026
- **Also known as:** ALPINE-CVE-2026-106072, AZL-111053, BIT-node-2026-106072, BIT-node-min-2026-106072, DEBIAN-CVE-2026-106072, GHSA-pghh-9966-75r7, UBUNTU-CVE-2026-106072

## What is CVE-2026-106072?

CVE-2026-106072 is a medium-severity vulnerability in nodejs node, published on 23 Oct 2026. 

### Official description

A flaw in Node.js TLS hostname verification allows a certificate with only a DNS SAN to authenticate an IP endpoint when the client connects using a non-canonical IPv4 spelling, such as `0177.0.0.1`, `0x7f.0.0.1`, `2130706433` or `127.1`.

`tls.checkServerIdentity()` did not classify these hosts as IP addresses, but normalized them to their canonical form and matched the result against the certificate DNS names. A certificate containing `DNS:127.0.0.1` and no `IP Address:127.0.0.1` SAN was therefore accepted, while the same certificate is correctly rejected for `127.0.0.1`. Exploitation requires a certificate with a numeric DNS SAN issued by a CA trusted by the client, and a platform resolver that accepts these spellings, such as glibc.

This vulnerability affects Node.js **26.x**, **24.x**, and **22.x**.

Weakness: CWE-295 (Improper Certificate Validation)

## Which versions are affected by CVE-2026-106072?

2 open source packages ship an affected version, including node and node-min.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `node` | Bitnami | All versions | 22.23.4, 24.22.1, 26.12.1 |
| `node-min` | Bitnami | All versions | 22.23.4, 24.22.1, 26.12.1 |

## How do I fix CVE-2026-106072?

Upgrade node to a fixed version for your release line: 22.23.4, 24.22.1 or 26.12.1.

## Is CVE-2026-106072 being exploited?

There is no known exploitation of CVE-2026-106072 in the wild and no public exploit code.

Public exploit code:

- Offline Node.js evidence checker for CVE-2026-106072: TLS noncanonical-IP DNS SAN acceptance. Single-file Python; JSON/CSV/HTML reports; no exploit payloads. (github_poc): https://github.com/CompleteTech-Security/node-cve-2026-106072-check

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-106072 and fix it if it is affected.

What it is: CVE-2026-106072 is a medium-severity vulnerability in nodejs node, published on 23 Oct 2026. 
Exploitation: There is no known exploitation of CVE-2026-106072 in the wild and no public exploit code.

Affected packages and fixed versions:
- node (Bitnami): affected all versions; fixed in 22.23.4, 24.22.1, 26.12.1
- node-min (Bitnami): affected all versions; fixed in 22.23.4, 24.22.1, 26.12.1

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-2026-106072/ (Markdown: https://insights.sbomify.com/CVE-2026-106072/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-106072
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-106072
- OSV: https://osv.dev/vulnerability/CVE-2026-106072

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-106072/
Summaries are generated and may contain mistakes; the official description above is the record.