CVE-2026-37236

CRITICALPre-NVD 9.89.8—
EchelonGraph scoreHIGH confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2026-08-28. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cisa-adp, epss, ghsa
Trending — 4 sources updated this week
9.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 9.8Exploit: None knownExposed: 0

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

grpc-gateway v2.28.0 is vulnerable to Incorrect Access Control. The application processes the X-HTTP-Method-Override header in ServeMux.ServeHTTP without restricting allowed methods. When a POST request with Content-Type application/x-www-form-urlencoded includes this header, the request method is rewritten to an arbitrary attacker-supplied value before routing. This allows bypassing method-based access controls enforced by upstream proxies or WAFs.

CVSS v3
9.8
EG Score
9.8(high)
EG Risk
59(Track)
EG Risk 59/100SSVC: 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
Severity98% × 45%
Exploitation0% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
38%
KEV
Not listed

Published

August 28, 2026

Last Modified

September 8, 2026

Advisory Details (3)

Auto-updated Sep 16, 2026
Upstream fix merged — awaiting tagged release. Sources: github_commit.
generic

CVE-2026-37236 · s00me00ne

https://s00me00ne.com/cve/cve-2026-37236/
github_commit

commit 72123cd4f325 (grpc-ecosystem/grpc-gateway)

Fix landed in grpc-ecosystem/grpc-gateway commit 72123cd4f325 — awaiting tagged release

https://github.com/grpc-ecosystem/grpc-gateway/commit/72123cd4f32545f6e1376873f412dcdcbcf29acc
generic

GitHub - grpc-ecosystem/grpc-gateway: gRPC to JSON proxy generator following the gRPC HTTP spec · GitHub

https://github.com/grpc-ecosystem/grpc-gateway

Vendor Advisories for CVE-2026-37236(1)

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

Affected Packages

(3 across 3 ecosystems)
Debian:12(1)
PackageVulnerable rangeFixed inDependents
golang-github-grpc-ecosystem-grpc-gateway1.16.0-1 ... 2.30.0-1 (11 versions)——
Debian:13(1)
PackageVulnerable rangeFixed inDependents
golang-github-grpc-ecosystem-grpc-gateway2.20.0-2, 2.27.2-1, 2.27.2-2, 2.27.2-3, 2.30.0-1——
Debian:14(1)
PackageVulnerable rangeFixed inDependents
golang-github-grpc-ecosystem-grpc-gateway2.20.0-2, 2.27.2-1, 2.27.2-2, 2.27.2-32.30.0-1—

Weakness Classification(1)

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

All Vendor Advisories

(1)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Data Freshness Timeline

(refreshed 88× in last 7d / 207× 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.

Showing the most recent 100 of 207 total refreshes for this CVE.

  1. 2026-09-20 23:30 UTCEG score recompute
  2. 2026-09-20 23:30 UTCVendor advisory
  3. 2026-09-20 23:30 UTCGHSA enrichment
  4. 2026-09-20 20:15 UTCEPSS rescore
  5. 2026-09-20 19:07 UTCVendor advisory
  6. 2026-09-20 19:07 UTCGHSA enrichment
  7. 2026-09-20 14:43 UTCVendor advisory
  8. 2026-09-20 14:43 UTCGHSA enrichment
  9. 2026-09-20 10:16 UTCVendor advisory
  10. 2026-09-20 10:16 UTCGHSA enrichment
  11. 2026-09-20 05:53 UTCVendor advisory
  12. 2026-09-20 05:53 UTCGHSA enrichment
  13. 2026-09-20 01:30 UTCVendor advisory
  14. 2026-09-20 01:30 UTCGHSA enrichment
  15. 2026-09-19 21:06 UTCVendor advisory
  16. 2026-09-19 21:06 UTCGHSA enrichment
  17. 2026-09-19 16:43 UTCEG score recompute
  18. 2026-09-19 16:43 UTCVendor advisory
  19. 2026-09-19 16:43 UTCGHSA enrichment
  20. 2026-09-19 12:20 UTCVendor advisory
  21. 2026-09-19 12:19 UTCGHSA enrichment
  22. 2026-09-19 07:56 UTCVendor advisory
  23. 2026-09-19 07:56 UTCGHSA enrichment
  24. 2026-09-19 03:33 UTCVendor advisory
  25. 2026-09-19 03:33 UTCGHSA enrichment
Show 75 more
  1. 2026-09-18 23:11 UTCEG score recompute
  2. 2026-09-18 23:11 UTCVendor advisory
  3. 2026-09-18 23:11 UTCGHSA enrichment
  4. 2026-09-18 19:28 UTCEPSS rescore
  5. 2026-09-18 19:28 UTCEPSS rescore
  6. 2026-09-18 18:48 UTCVendor advisory
  7. 2026-09-18 18:48 UTCGHSA enrichment
  8. 2026-09-18 14:25 UTCVendor advisory
  9. 2026-09-18 14:25 UTCGHSA enrichment
  10. 2026-09-18 10:02 UTCVendor advisory
  11. 2026-09-18 10:02 UTCGHSA enrichment
  12. 2026-09-18 05:39 UTCVendor advisory
  13. 2026-09-18 05:39 UTCGHSA enrichment
  14. 2026-09-18 01:16 UTCVendor advisory
  15. 2026-09-18 01:16 UTCGHSA enrichment
  16. 2026-09-17 20:53 UTCEG score recompute
  17. 2026-09-17 20:53 UTCVendor advisory
  18. 2026-09-17 20:53 UTCGHSA enrichment
  19. 2026-09-17 19:30 UTCEPSS rescore
  20. 2026-09-17 13:04 UTCVendor advisory
  21. 2026-09-17 13:04 UTCGHSA enrichment
  22. 2026-09-17 08:41 UTCVendor advisory
  23. 2026-09-17 08:41 UTCGHSA enrichment
  24. 2026-09-17 04:18 UTCVendor advisory
  25. 2026-09-17 04:18 UTCGHSA enrichment
  26. 2026-09-16 23:55 UTCVendor advisory
  27. 2026-09-16 23:55 UTCGHSA enrichment
  28. 2026-09-16 19:32 UTCVendor advisory
  29. 2026-09-16 19:32 UTCGHSA enrichment
  30. 2026-09-16 15:08 UTCEG score recompute
  31. 2026-09-16 15:08 UTCVendor advisory
  32. 2026-09-16 15:08 UTCGHSA enrichment
  33. 2026-09-16 14:08 UTCEPSS rescore
  34. 2026-09-16 10:45 UTCVendor advisory
  35. 2026-09-16 10:45 UTCGHSA enrichment
  36. 2026-09-16 06:22 UTCEG score recompute
  37. 2026-09-16 06:22 UTCVendor advisory
  38. 2026-09-16 06:22 UTCGHSA enrichment
  39. 2026-09-16 05:15 UTCEPSS rescore
  40. 2026-09-16 01:58 UTCVendor advisory
  41. 2026-09-16 01:58 UTCGHSA enrichment
  42. 2026-09-15 21:35 UTCVendor advisory
  43. 2026-09-15 21:34 UTCGHSA enrichment
  44. 2026-09-15 17:10 UTCVendor advisory
  45. 2026-09-15 17:10 UTCGHSA enrichment
  46. 2026-09-15 12:47 UTCVendor advisory
  47. 2026-09-15 12:47 UTCGHSA enrichment
  48. 2026-09-15 08:24 UTCVendor advisory
  49. 2026-09-15 08:24 UTCGHSA enrichment
  50. 2026-09-15 04:01 UTCEG score recompute
  51. 2026-09-15 04:01 UTCVendor advisory
  52. 2026-09-15 04:01 UTCGHSA enrichment
  53. 2026-09-15 03:11 UTCEPSS rescore
  54. 2026-09-14 23:37 UTCVendor advisory
  55. 2026-09-14 23:37 UTCGHSA enrichment
  56. 2026-09-14 18:54 UTCVendor advisory
  57. 2026-09-14 18:54 UTCGHSA enrichment
  58. 2026-09-14 14:27 UTCVendor advisory
  59. 2026-09-14 14:27 UTCGHSA enrichment
  60. 2026-09-14 10:04 UTCVendor advisory
  61. 2026-09-14 10:04 UTCGHSA enrichment
  62. 2026-09-14 05:17 UTCVendor advisory
  63. 2026-09-14 05:17 UTCGHSA enrichment
  64. 2026-09-14 00:54 UTCVendor advisory
  65. 2026-09-14 00:54 UTCGHSA enrichment
  66. 2026-09-13 20:31 UTCEG score recompute
  67. 2026-09-13 20:31 UTCVendor advisory
  68. 2026-09-13 20:31 UTCGHSA enrichment
  69. 2026-09-13 16:47 UTCEPSS rescore
  70. 2026-09-13 16:08 UTCVendor advisory
  71. 2026-09-13 16:08 UTCGHSA enrichment
  72. 2026-09-13 11:45 UTCVendor advisory
  73. 2026-09-13 11:45 UTCGHSA enrichment
  74. 2026-09-13 07:22 UTCVendor advisory
  75. 2026-09-13 07:22 UTCGHSA enrichment

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-37236?
CVE-2026-37236 is a critical vulnerability published on August 28, 2026. grpc-gateway v2.28.0 is vulnerable to Incorrect Access Control. The application processes the X-HTTP-Method-Override header in ServeMux.ServeHTTP without restricting allowed methods. When a POST request with Content-Type application/x-www-form-urlencoded includes this header, the request method is…
When was CVE-2026-37236 disclosed?
CVE-2026-37236 was first published in the National Vulnerability Database on August 28, 2026, with the most recent update on September 8, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-37236 actively exploited?
CVE-2026-37236 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 62.4% of all scored CVEs.
What is the CVSS score of CVE-2026-37236?
CVE-2026-37236 has a CVSS v3.1 base score of 9.8 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-37236?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-37236, 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

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