---
id: CVE-2026-16637
title: >-
  OPeNDAP Hyrax allows SSRF and credential disclosure via unvalidated HTTP
  redirects that bypass the AllowedHosts allowlist and leak Earthdata headers
  (User-Id, Echo-Token) to attacker-controlled endpoints.
summary: >-
  OPeNDAP Hyrax allows SSRF and credential disclosure via unvalidated HTTP
  redirects that bypass the AllowedHosts allowlist and leak Earthdata headers
  (User-Id, Echo-Token) to attacker-controlled endpoints.
severity: medium
cvss: 6.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N'
cwe:
  - CWE-201
  - CWE-918
published: '2026-08-07'
updated: '2026-09-08'
sourceUpdated: '2026-09-08T14:09:00.860'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-16637'
references:
  - url: 'https://github.com/OPENDAP/hyrax-docker'
    label: cret@cert.org
  - url: 'https://www.opendap.org/official-hyrax-1-18-release/'
    label: cret@cert.org
  - url: 'https://www.kb.cert.org/vuls/id/305509'
    label: af854a3a-2127-422b-91ae-364da2661108
tags:
  - nvd
epss: 0.00397
epssPercentile: 0.33755
ingestedAt: '2026-09-08T15:33:26.951Z'
---

## Overview

OPeNDAP Hyrax allows SSRF and credential disclosure via unvalidated HTTP redirects that bypass the AllowedHosts allowlist and leak Earthdata headers (User-Id, Echo-Token) to attacker-controlled endpoints.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.