CVE-2026-69210

HIGHPre-NVD 7.57.5
EchelonGraph scoreMEDIUM confidence

“—” beside the score: it is equal to the CVSS score beside it.

This high-severity CVE scores 7.5 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.6% (50th percentile of EPSS-scored CVEs). No GitHub Security Advisory CVSS is on record for this CVE.

Triggered by: Headline CVSS from a secondary CVSS source
Sources: EPSS, a secondary CVSS source

Also known asEUVD-2026-79192 (ENISA EUVD)Source: ENISA EUVD

7.5EG
EchelonGraph verdictPlan a fixRemediate within your standard update timelines at low or medium mission impact and sooner than that at high (the SSVC decision on this page).
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.6%CVSS: 7.5Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

Http4s is a Scala interface for HTTP services. Prior to 0.23.35 and 1.0.0-M47, WebSocket FrameTranscoder.bodyLength rejects extended payload lengths above Integer.MAX_VALUE but permits negative 64-bit lengths. A remote client that completes a WebSocket handshake through an Ember server can send such a frame, causing the decoder to return an empty frame without advancing its input. The decode loop then runs indefinitely, pins a worker at full CPU, and grows an ArrayBuffer without bound, resulting in denial of service. This issue is fixed in versions 0.23.35 and 1.0.0-M47.

CVSS v3
7.5
EG Score
7.5HIGHmedium confidence
EG Risk
49
EG Risk 49/100

EG Risk is EchelonGraph's 0–100 priority score. It fuses impact severity (EG Severity, the CVSS base score, never the KEV-floored or EPSS-lifted EG Score) with real-world exploitation and automatability, under weights EchelonGraph set by hand, so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner.

How it’s computed (value × EchelonGraph’s weight)
Severity75% × 45%
Impact severity (EG Severity): CVSS 7.5 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation0.6% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
Automatability100% × 15%
CISA's SSVC Automatable value: yes (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Attend at high (mission-essential systems).
Exploitation none (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.
Action: A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.
EPSS PROB
0.6%
EPSS %ILE
50th
KEV
Not listed

What the EG score is made of (scorer v4.0: the three questions the 0–10 score mixes, published apart · methodology)

The EG score (7.5): severity, escalated by confirmed exploitation. This CVE's 7.5 is its impact severity (EG Severity), not escalated.

EG Severity
7.5 HIGHCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.a secondary CVSS source · CVSS v3.0 or v3.1
EG Likelihood
0.6% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-10-27). FIRST's exploitation probability, not an EchelonGraph model.
Confirmed exploitation
None on record (CISA KEV, EG-KEV Tier 1)Reported apart from the likelihood: an observed fact, not a probability.
EG Priority
SSVC Track at medium mission impactTrack at low or medium mission impact; Attend at high (mission-essential systems).CISA BOD 26-04: 14 days if the affected system is publicly exposed; 60 days if it is not.Each input and its source, and whom BOD 26-04 binds: the SSVC and BOD 26-04 blocks below.

SSVC (CISA's decision table, applied by EchelonGraph)Track at low or medium mission impact; Attend at high (mission-essential systems).

A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.

Exploitation none (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table

BOD 26-04 (CISA's remediation timeline, Table 1)14 days if the affected system is publicly exposed; 60 days if it is not.

The score's inputs: In CISA KEV no (CISA's KEV catalog) · Automatable yes (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it

Published

September 15, 2026

Last Modified

September 17, 2026

Advisory Details (4)

Auto-updated Sep 15, 2026
Patch available. Sources: github, github_commit, github_release.
GitHub release Patch Available

v1.0.0-M47

Patch available: http4s/http4s v1.0.0-M47 (pre-release)

https://github.com/http4s/http4s/releases/tag/v1.0.0-M47
GitHub release Patch Available

v0.23.35

Patch available: http4s/http4s v0.23.35

https://github.com/http4s/http4s/releases/tag/v0.23.35
GitHub commit Patch Available

commit c7d3ef90dc2e (http4s/http4s)

Patch available: http4s/http4s v0.23.35 (contains commit c7d3ef90dc2e)

https://github.com/http4s/http4s/commit/c7d3ef90dc2ed1cd464968ab1b34f2f1762ddae2
GitHub advisoryMentions a patch (unverified)

WebSocket decoder accepts negative length, causing infinite decode loop · Advisory · http4s/http4s · GitHub

https://github.com/http4s/http4s/security/advisories/GHSA-3j86-pj9g-jchr

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 8× in last 7d / 45× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. 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. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.

  1. 2026-11-01 16:35 UTCEPSS rescoreEPSS 0.6% · 50th percentile
  2. 2026-10-31 16:33 UTCEPSS rescoreEPSS 0.6% · 50th percentile
  3. 2026-10-30 16:35 UTCEPSS rescoreEPSS 0.6% · 50th percentile
  4. 2026-10-29 16:33 UTCEPSS rescoreEPSS 0.6% · 50th percentile
  5. 2026-10-28 16:33 UTCEPSS rescoreEPSS 0.6% · 50th percentile
  6. 2026-10-27 19:06 UTCEG score recompute
  7. 2026-10-27 16:32 UTCEPSS rescoreEPSS 0.6% · 49th percentile
  8. 2026-10-26 16:32 UTCEPSS rescoreEPSS 0.6% · 49th percentile
  9. 2026-10-25 16:33 UTCEPSS rescoreEPSS 0.6% · 49th percentile
  10. 2026-10-25 14:09 UTCEG score recompute
  11. 2026-10-24 16:33 UTCEPSS rescoreEPSS 0.6% · 49th percentile
  12. 2026-10-23 16:32 UTCEPSS rescoreEPSS 0.6% · 49th percentile
  13. 2026-10-22 16:35 UTCEPSS rescoreEPSS 0.6% · 49th percentile
  14. 2026-10-21 16:33 UTCEPSS rescoreEPSS 0.6% · 49th percentile
  15. 2026-10-20 16:33 UTCEPSS rescoreEPSS 0.6% · 49th percentile
  16. 2026-10-20 08:58 UTCEG score recompute
  17. 2026-10-19 16:32 UTCEPSS rescoreEPSS 0.6% · 49th percentile
  18. 2026-10-18 16:32 UTCEPSS rescoreEPSS 0.6% · 49th percentile
  19. 2026-10-18 03:19 UTCEG score recompute
  20. 2026-10-17 16:35 UTCEPSS rescoreEPSS 0.6% · 49th percentile
  21. 2026-10-16 16:43 UTCEPSS rescoreEPSS 0.6% · 49th percentile
  22. 2026-10-15 16:32 UTCEPSS rescoreEPSS 0.6% · 49th percentile
  23. 2026-10-14 16:33 UTCEPSS rescoreEPSS 0.6% · 48th percentile
  24. 2026-10-13 16:35 UTCEPSS rescoreEPSS 0.6% · 48th percentile
  25. 2026-10-13 09:55 UTCEG score recompute
Show 52 more
  1. 2026-10-12 16:34 UTCEPSS rescoreEPSS 0.6% · 48th percentile
  2. 2026-10-12 15:44 UTCEG score recompute
  3. 2026-10-11 19:27 UTCEG score recompute
  4. 2026-10-11 16:45 UTCEG score recompute
  5. 2026-10-11 14:05 UTCEG score recompute
  6. 2026-10-11 13:49 UTCEPSS rescoreEPSS 0.6% · 48th percentile
  7. 2026-10-11 05:33 UTCEG score recompute
  8. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.6% · 48th percentile
  9. 2026-10-10 04:03 UTCEG score recompute
  10. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.6% · 48th percentile
  11. 2026-10-08 22:12 UTCEG score recompute
  12. 2026-10-08 17:13 UTCEPSS rescoreEPSS 0.6% · 48th percentile
  13. 2026-10-08 07:06 UTCEG score recompute
  14. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.6% · 48th percentile
  15. 2026-10-06 18:00 UTCEG score recompute
  16. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.6% · 48th percentile
  17. 2026-10-06 05:44 UTCEG score recompute
  18. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.6% · 48th percentile
  19. 2026-10-03 16:17 UTCEG score recompute
  20. 2026-10-03 14:26 UTCEPSS rescoreEPSS 0.6% · 48th percentile
  21. 2026-10-03 04:01 UTCEG score recompute
  22. 2026-10-02 17:56 UTCEPSS rescoreEPSS 0.6% · 48th percentile
  23. 2026-10-02 03:21 UTCEG score recompute
  24. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.6% · 48th percentile
  25. 2026-10-01 02:07 UTCEG score recompute
  26. 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.6% · 48th percentile
  27. 2026-09-30 01:33 UTCEG score recompute
  28. 2026-09-29 00:58 UTCEG score recompute
  29. 2026-09-28 13:52 UTCEPSS rescoreEPSS 0.6% · 48th percentile
  30. 2026-09-28 00:26 UTCEG score recompute
  31. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.6% · 48th percentile
  32. 2026-09-26 23:52 UTCEG score recompute
  33. 2026-09-26 15:59 UTCEPSS rescoreEPSS 0.6% · 48th percentile
  34. 2026-09-26 11:35 UTCEG score recompute
  35. 2026-09-24 22:26 UTCEG score recompute
  36. 2026-09-23 21:53 UTCEG score recompute
  37. 2026-09-23 17:54 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  38. 2026-09-22 21:20 UTCEG score recompute
  39. 2026-09-22 09:04 UTCEG score recompute
  40. 2026-09-21 21:09 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  41. 2026-09-21 08:28 UTCEG score recompute
  42. 2026-09-20 20:16 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  43. 2026-09-19 19:17 UTCEG score recompute
  44. 2026-09-19 07:00 UTCEG score recompute
  45. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  46. 2026-09-18 06:25 UTCEG score recompute
  47. 2026-09-17 18:08 UTCEG score recompute
  48. 2026-09-16 21:05 UTCEG score recompute
  49. 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  50. 2026-09-15 20:40 UTCEG score recompute
  51. 2026-09-15 19:23 UTCEG score recomputeFirst assessed: 7.5 HIGH
  52. 2026-09-15 19:22 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-69210?
CVE-2026-69210 is a high-severity vulnerability; its CVE record was published on September 15, 2026. Http4s is a Scala interface for HTTP services. Prior to 0.23.35 and 1.0.0-M47, WebSocket FrameTranscoder.bodyLength rejects extended payload lengths above Integer.MAX_VALUE but permits negative 64-bit lengths. A remote client that completes a WebSocket handshake through an Ember server can send…
When was the CVE record for CVE-2026-69210 published?
The CVE record for CVE-2026-69210 was published on September 15, 2026. That is the record's publication date; the vulnerability itself may have been made public earlier. EchelonGraph's copy of the record carries a last-modified date of September 17, 2026; the record at its source may have been updated since.
Is CVE-2026-69210 actively exploited?
CVE-2026-69210 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.6% probability of exploitation in the next 30 days (50th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-69210?
CVE-2026-69210 has a CVSS base score of 7.5 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-69210?
A fix for CVE-2026-69210 is available: update to the fixed version the vendor names in its advisory.

Dependency Blast Radius

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