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OPeNDAP Hyrax CVE-2026-16637

| EUVDEUVD-2026-54479 MEDIUM
Insertion of Sensitive Information Into Sent Data (CWE-201)
2026-08-07 certcc GHSA-7c9q-38r9-q62m
6.5
CVSS 3.1 · Vendor: certcc
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Severity by source

Vendor (certcc) PRIMARY
6.5 MEDIUM
AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
vuln.today AI
6.5 MEDIUM

Network-accessible with no privileges on Hyrax required; UI:R reflects user-triggered fetch; C:H for bearer-equivalent Earthdata credential leakage; no integrity or availability impact.

3.1 AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
4.0 AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N

Primary rating from Vendor (certcc).

CVSS VectorVendor: certcc

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
None

Lifecycle Timeline

3
Analysis Generated
Aug 10, 2026 - 12:23 vuln.today
CVSS changed
Aug 10, 2026 - 12:22 NVD
6.5 (MEDIUM)
CVE Published
Aug 07, 2026 - 13:14 cve.org
UNKNOWN (no severity yet)

DescriptionCVE.org

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.

AnalysisAI

Unvalidated HTTP redirect handling in OPeNDAP Hyrax Docker 1.18.0 enables SSRF-assisted credential exfiltration, leaking Earthdata authentication headers (User-Id, Echo-Token) to attacker-controlled endpoints. The AllowedHosts allowlist - intended to restrict outbound server-side requests - is silently bypassed when Hyrax follows HTTP redirects without re-validating the destination against the allowlist, causing sensitive Earthdata Login (EDL) session headers to be forwarded externally. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access
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Delivery
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Exploit
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Execution
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Persist
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Impact
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Vulnerability AssessmentAI

Exploitation Exploitation requires that Hyrax be deployed with NASA Earthdata Login (EDL) integration active - specifically, the configuration that causes Hyrax to inject User-Id and Echo-Token headers into outbound HTTP data-fetch requests. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment The CVSS 6.5 score with vector AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N reflects a network-accessible, low-complexity attack with no privilege requirement on Hyrax itself, but requiring user interaction - likely a user or automated client triggering a data request to an attacker-influenced URL. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario Full exploit scenario with step-by-step reproduction available after sign-in.
Remediation Consult the CERT/CC advisory at https://www.kb.cert.org/vuls/id/305509 for authoritative remediation guidance, as it is the primary coordinated disclosure source. … Detailed patch versions, workarounds, and compensating controls in full report.

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CVE-2026-16637 vulnerability details – vuln.today

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