CVE-2026-16637

MEDIUMPre-NVD 6.56.5—
EchelonGraph scoreHIGH confidence

Score 6.5 from GitHub Security Advisory published 2026-08-07. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 6.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cisa-adp, epss, ghsa
Trending — 3 sources updated this week
6.5EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 6.5Exploit: None knownExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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.

CVSS v3
6.5
EG Score
6.5(high)
EG Risk
29(Track)
EG Risk 29/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity65% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
38%
KEV
Not listed

Published

August 7, 2026

Last Modified

August 10, 2026

Advisory Details (3)

Auto-updated Aug 10, 2026
No patch confirmed yet. Sources: cert.
cert

VU#305509 - OPeNDAP Hyrax is vulnerable to SSRF and Credential Disclosure

https://www.kb.cert.org/vuls/id/305509
generic

Official Hyrax-1.18 Release — OPeNDAP

https://www.opendap.org/official-hyrax-1-18-release/
generic

GitHub - OPENDAP/hyrax-docker · GitHub

https://github.com/OPENDAP/hyrax-docker

Vendor Advisories for CVE-2026-16637(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(2)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 23× in last 7d / 42× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-08-21 06:15 UTCEG score recompute
  2. 2026-08-21 06:15 UTCGHSA enrichment
  3. 2026-08-20 22:55 UTCEPSS rescore
  4. 2026-08-20 06:49 UTCEG score recompute
  5. 2026-08-20 06:49 UTCGHSA enrichment
  6. 2026-08-19 17:03 UTCEPSS rescore
  7. 2026-08-19 07:22 UTCEG score recompute
  8. 2026-08-19 07:22 UTCGHSA enrichment
  9. 2026-08-18 13:48 UTCEPSS rescore
  10. 2026-08-18 07:55 UTCEG score recompute
  11. 2026-08-18 07:55 UTCGHSA enrichment
  12. 2026-08-17 13:47 UTCEPSS rescore
  13. 2026-08-17 08:28 UTCEG score recompute
  14. 2026-08-17 08:28 UTCGHSA enrichment
  15. 2026-08-16 14:56 UTCEPSS rescore
  16. 2026-08-16 09:02 UTCEG score recompute
  17. 2026-08-16 09:02 UTCGHSA enrichment
  18. 2026-08-16 02:14 UTCEPSS rescore
  19. 2026-08-15 09:36 UTCEG score recompute
  20. 2026-08-15 09:36 UTCGHSA enrichment
  21. 2026-08-15 01:30 UTCEPSS rescore
  22. 2026-08-14 10:09 UTCEG score recompute
  23. 2026-08-14 10:09 UTCGHSA enrichment
  24. 2026-08-13 22:00 UTCEPSS rescore
  25. 2026-08-13 10:43 UTCEG score recompute
Show 17 more
  1. 2026-08-13 10:43 UTCGHSA enrichment
  2. 2026-08-12 13:50 UTCEPSS rescore
  3. 2026-08-12 11:17 UTCEG score recompute
  4. 2026-08-12 11:17 UTCGHSA enrichment
  5. 2026-08-11 13:42 UTCEPSS rescore
  6. 2026-08-11 11:50 UTCEG score recompute
  7. 2026-08-11 11:50 UTCGHSA enrichment
  8. 2026-08-11 00:00 UTCEPSS rescore
  9. 2026-08-10 12:24 UTCGHSA enrichment
  10. 2026-08-10 12:01 UTCEG score recompute▲ 6.50
  11. 2026-08-10 12:01 UTCGHSA enrichment
  12. 2026-08-10 12:01 UTCMITRE cvelistV5CVSS v3 → 6.5 · severity → MEDIUM
  13. 2026-08-09 13:46 UTCEPSS rescore
  14. 2026-08-08 16:37 UTCEPSS rescore
  15. 2026-08-07 14:26 UTCNVD update
  16. 2026-08-07 13:48 UTCEG score recompute
  17. 2026-08-07 13:47 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-16637?
CVE-2026-16637 is a medium vulnerability published on August 7, 2026. 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.
When was CVE-2026-16637 disclosed?
CVE-2026-16637 was first published in the National Vulnerability Database on August 7, 2026, with the most recent update on August 10, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-16637 actively exploited?
CVE-2026-16637 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 61.9% of all scored CVEs.
What is the CVSS score of CVE-2026-16637?
CVE-2026-16637 has a CVSS v3.1 base score of 6.5 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-16637?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-16637, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

Explore the affected products and dependency analysis for CVE-2026-16637

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