Certificate Overwriting Vulnerability in Routinator by NLnet Labs
CVE-2026-72755

3.8LOW

Key Information:

Vendor

Nlnet Labs

Status
Routinator
Vendor
CVE Published:
26 October 2026

What is CVE-2026-72755?

Routinator, a tool for managing RPKI data, is susceptible to a vulnerability that allows it to store a newly downloaded Trust Anchor (TA) certificate via HTTPS in its cache without appropriate validation. This misconfiguration may lead to the overwriting of an existing, valid TA certificate with a potentially invalid one if validation fails. Such behavior raises significant security concerns, as it undermines the integrity of the certificate management process and could lead to improper routing decisions.

Affected Version(s)

Routinator 0.15.3

References

https://www.nlnetlabs.nl/downloads/routinator/CVE-2026-72...
vendor-advisory

CVSS V3.1

Score:
3.8
Severity:
LOW
Confidentiality:
None
Integrity:
Low
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
High
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Xin Wang and Jiajia Liu, Northwestern Polytechnical University
.