---
id: "CVE-2026-72755"
kind: "vulnerability"
aliases: ["CVE-2026-72755"]
title: "Routinator: unvalidated TA certificate fetched over HTTPS can overwrite cached trust anchor"
severity: "low"
cvss: 3.8
epss: null
exploited: false
status: "open"
category: "package"
products: []
ecosystems: []
tags: ["package", "routinator", "rpki", "self-hosted"]
not_affected_if: []
published_at: "2026-10-26T18:18:41+00:00"
first_seen_at: "2026-10-26T18:31:44+00:00"
updated_at: "2026-10-26T18:34:18+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-72755", "first_seen_at": "2026-10-26T18:31:44+00:00"}]
---

# Routinator: unvalidated TA certificate fetched over HTTPS can overwrite cached trust anchor

Routinator, an RPKI validator, caches a trust anchor certificate it fetches over HTTPS without validating it first. A failed validation can still replace a previously good cached certificate.

_Summary, check and fix written by a model from the sources; labelled as such._

## Timeline

- 2026-10-26T18:31:44+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-72755

## From the sources

Routinator stores a newly-retrieved TA certificate via HTTPS in cache without validation, potentially overwriting a known good TA certificate even if validation fails.

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_Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai_