# CVE-2026-101969: Junos OS and Junos OS Evolved: An unauthenticated attacker causes rpd denial of service when IPv6 PIM is enabled

> An unauthenticated attacker can cause a denial of service in Junos OS by sending malformed PIM Hello messages when IPv6 PIM is enabled.

- **Severity:** High 7.1 (`CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L/AU:Y/R:A/V:C/RE:M`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 14 Oct 2026
- **Updated:** 14 Oct 2026
- **Also known as:** GHSA-75wv-7fq3-rpgq

## What is CVE-2026-101969?

CVE-2026-101969 is a high-severity denial of service vulnerability in Juniper Networks Junos OS, published on 14 Oct 2026. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

An Improper Input Validation vulnerability in the rpd process of Juniper Networks Junos OS and Junos OS Evolved allows an unauthenticated adjacent attacker to cause a denial of service via a malformed PIM Hello message received on an IPv6-enabled PIM interface.

Weakness: CWE-20 (Improper Input Validation)

## Which versions are affected by CVE-2026-101969?


## How do I fix CVE-2026-101969?

No fix has been published for CVE-2026-101969 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-101969 being exploited?

There is no known exploitation of CVE-2026-101969 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-101969 and fix it if it is affected.

What it is: CVE-2026-101969 is a high-severity denial of service vulnerability in Juniper Networks Junos OS, published on 14 Oct 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-101969 in the wild and no public exploit code.

Affected product: Juniper Networks Junos OS. 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-2026-101969/ (Markdown: https://insights.sbomify.com/CVE-2026-101969/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-101969
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-101969
- OSV: https://osv.dev/vulnerability/CVE-2026-101969

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-101969/
Summaries are generated and may contain mistakes; the official description above is the record.