CVE-2026-49234 Routinator crashes on specifically crafted ASN strings in the API
Attackers can crash the Routinator RPKI server by sending malformed ASN strings to the API, affecting deployments with open API access.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-49234?
CVE-2026-49234 is a high-severity denial of service vulnerability in NLnet Labs Routinator, published on 8 Jun 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
When sending a specifically crafted non-UTF-8 string as select-asn query parameter to the /api/v1/origins endpoint, Routinator crashes.
This only affects users who allow API access from untrusted networks.
Weakness: CWE-20
Which versions are affected by CVE-2026-49234?
2 open source packages ship an affected version, including routinator. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
routinator crates.io | All versions | 0.15.2 |
routinator crates.io | All versions | 0.15.2 |
Products include Nlnetlabs Routinator.
How do I fix CVE-2026-49234?
Upgrade routinator to 0.15.2 or later.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2026-49234 being exploited?
There is no known exploitation of CVE-2026-49234 in the wild and no public exploit code.
Other vulnerabilities in NLnet Labs Routinator
- CVE-2023-39916 Possible path traversal when storing RRDP responses
- CVE-2026-49235 Routinator crashes on specifically crafted RRDP XML files
- CVE-2026-49233 Routinator cache path traversal using rogue rsync URIs
- CVE-2023-39915 Crashes on parsing certain invalid RPKI objects
- CVE-2022-3029 Fatal error on incorrect base64 data in RRDP
Sources
Also known as GHSA-gc6q-cwcj-3vh9.