CVE-2026-48090

MEDIUMPre-NVD 5.95.9—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 5.9 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.4%, top 64% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, secondary
Elevated
5.9EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 5.9Exploit: Elevated riskExposed: 0

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

Envoy is an open source edge and service proxy designed for cloud-native applications. From 1.37.0 until 1.37.5 and 1.38.3, the HTTP OAuth2 filter (envoy.filters.http.oauth2) can leave an in-flight async token exchange attached to a downstream stream that has already been torn down. A late AsyncClient completion can still invoke OAuth2Filter methods that use StreamDecoderFilterCallbacks after that object’s lifetime has ended, causing undefined behavior, worker crashes (availability loss), and use-after-free / invalid-vptr failures under AddressSanitizer. This is a memory-safety / lifetime issue in the data plane, not a trivial config bug. Remote code execution is not claimed here; the primary demonstrated impact is DoS via crash and UB; any further impact would be deployment- and allocator-dependent. This vulnerability is fixed in 1.37.5 and 1.38.3.

CVSS v3
5.9
EG Score
5.9(medium)
EG Risk
43(Track)
EG Risk 43/100SSVC: 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
Severity59% × 45%
Exploitation40% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
36%
KEV
Not listed

Published

June 26, 2026

Last Modified

July 8, 2026

Advisory Details (1)

Auto-updated Jun 26, 2026
🔬 Proof of concept available. Patch available. Sources: github.
github Patch Available🟡 PoC Available

HTTP: OAuth2 filter late async token completion after stream teardown (UAF / crash risk) · Advisory · envoyproxy/envoy · GitHub

https://github.com/envoyproxy/envoy/security/advisories/GHSA-3cj2-c63f-q26f

Vendor Advisories for CVE-2026-48090(1)

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

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 13× in last 7d / 49× 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 08:38 UTCEG score recompute
  2. 2026-08-20 22:55 UTCEPSS rescore
  3. 2026-08-20 06:46 UTCEG score recompute
  4. 2026-08-19 17:04 UTCEPSS rescore
  5. 2026-08-18 23:45 UTCEG score recompute
  6. 2026-08-18 13:48 UTCEPSS rescore
  7. 2026-08-17 13:47 UTCEPSS rescore
  8. 2026-08-17 13:20 UTCEG score recompute
  9. 2026-08-16 14:56 UTCEPSS rescore
  10. 2026-08-16 11:28 UTCEG score recompute
  11. 2026-08-16 02:14 UTCEPSS rescore
  12. 2026-08-15 09:37 UTCEG score recompute
  13. 2026-08-15 01:30 UTCEPSS rescore
  14. 2026-08-14 07:45 UTCEG score recompute
  15. 2026-08-13 22:00 UTCEPSS rescore
  16. 2026-08-13 05:53 UTCEG score recompute
  17. 2026-08-12 13:51 UTCEPSS rescore
  18. 2026-08-12 04:01 UTCEG score recompute
  19. 2026-08-11 02:09 UTCEG score recompute
  20. 2026-08-11 00:00 UTCEPSS rescore
  21. 2026-08-10 00:17 UTCEG score recompute
  22. 2026-08-09 13:46 UTCEPSS rescore
  23. 2026-08-08 22:25 UTCEG score recompute
  24. 2026-08-08 16:37 UTCEPSS rescore
  25. 2026-08-07 20:33 UTCEG score recompute
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  1. 2026-08-06 18:41 UTCEG score recompute
  2. 2026-08-06 13:47 UTCEPSS rescore
  3. 2026-08-05 19:17 UTCEPSS rescore
  4. 2026-08-05 16:49 UTCEG score recompute
  5. 2026-08-04 15:10 UTCEPSS rescore
  6. 2026-08-04 14:56 UTCEG score recompute
  7. 2026-08-04 10:39 UTCEPSS rescore
  8. 2026-08-03 10:36 UTCEPSS rescore
  9. 2026-08-02 05:58 UTCEG score recompute
  10. 2026-08-02 02:27 UTCEPSS rescore
  11. 2026-08-01 04:16 UTCEPSS rescore
  12. 2026-07-31 02:12 UTCEG score recompute
  13. 2026-07-30 16:28 UTCEPSS rescore
  14. 2026-07-30 01:30 UTCEPSS rescore
  15. 2026-07-28 20:24 UTCEG score recompute
  16. 2026-07-28 15:37 UTCEPSS rescore
  17. 2026-07-27 17:06 UTCEG score recompute
  18. 2026-07-26 14:54 UTCEPSS rescore
  19. 2026-07-26 14:33 UTCEG score recompute
  20. 2026-07-25 14:18 UTCEPSS rescore
  21. 2026-07-24 14:18 UTCEPSS rescore
  22. 2026-07-23 14:18 UTCEPSS rescore
  23. 2026-07-23 03:18 UTCEG score recompute
  24. 2026-07-22 14:08 UTCEPSS rescore
  25. 2026-07-21 15:24 UTCEPSS rescore
  26. 2026-07-20 17:08 UTCEPSS rescore
  27. 2026-07-19 14:31 UTCEPSS rescore
  28. 2026-07-19 02:29 UTCEPSS rescore
  29. 2026-07-18 10:04 UTCEPSS rescore
  30. 2026-07-16 17:03 UTCEPSS rescore
  31. 2026-07-15 16:57 UTCEPSS rescore
  32. 2026-07-15 02:00 UTCEPSS rescore
  33. 2026-07-13 22:30 UTCEPSS rescore
  34. 2026-07-13 06:13 UTCEPSS rescore
  35. 2026-07-12 05:46 UTCEPSS rescore
  36. 2026-07-11 08:27 UTCEPSS rescore
  37. 2026-07-09 19:10 UTCEPSS rescore
  38. 2026-07-08 15:16 UTCEPSS rescore
  39. 2026-07-07 13:46 UTCEPSS rescore
  40. 2026-07-06 16:27 UTCEPSS rescore
  41. 2026-07-06 02:23 UTCEPSS rescore
  42. 2026-07-05 02:30 UTCEPSS rescore
  43. 2026-07-04 06:31 UTCEPSS rescore
  44. 2026-07-01 15:07 UTCEPSS rescore
  45. 2026-06-30 23:22 UTCEPSS rescore
  46. 2026-06-29 14:06 UTCEPSS rescore
  47. 2026-06-29 14:06 UTCEPSS rescore
  48. 2026-06-28 14:07 UTCEPSS rescore
  49. 2026-06-28 04:56 UTCEPSS rescore
  50. 2026-06-28 04:56 UTCEPSS rescore
  51. 2026-06-26 19:42 UTCEG score recompute
  52. 2026-06-26 19:41 UTCNVD updatefirst tracked

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Frequently asked(5)

What is CVE-2026-48090?
CVE-2026-48090 is a medium vulnerability published on June 26, 2026. Envoy is an open source edge and service proxy designed for cloud-native applications. From 1.37.0 until 1.37.5 and 1.38.3, the HTTP OAuth2 filter (envoy.filters.http.oauth2) can leave an in-flight async token exchange attached to a downstream stream that has already been torn down. A late…
When was CVE-2026-48090 disclosed?
CVE-2026-48090 was first published in the National Vulnerability Database on June 26, 2026, with the most recent update on July 8, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-48090 actively exploited?
CVE-2026-48090 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 64.2% of all scored CVEs.
What is the CVSS score of CVE-2026-48090?
CVE-2026-48090 has a CVSS v3 base score of 5.9 (NVD).
How do I remediate CVE-2026-48090?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-48090, 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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