CVE-2026-69216

MEDIUMPre-NVD 5.45.4
EchelonGraph scoreMEDIUM confidence

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

Score 5.4 from GitHub Security Advisory (severity: MODERATE) published 2026-09-15. A secondary CVSS source baseline 5.4; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: EPSS, GitHub Security Advisory, a secondary CVSS source
Trending — 4 sources updated this week

Also known asEUVD-2026-79176 (ENISA EUVD) · GHSA-jrpm-956j-96jg (GitHub Security Advisories)Source: ENISA EUVD

5.4EG
EchelonGraph verdictMonitorRemediate within your standard update timelines (the SSVC decision on this page).
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.4%CVSS: 5.4Exploit: 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, Ember’s chunk decoder trims the chunk-size token and accepts leading plus or minus signs instead of requiring one or more hexadecimal digits followed by the required CRLF. When an intermediary forwards chunked data without re-encoding and interprets malformed chunk boundaries differently, an unauthenticated attacker can create TE.TE request smuggling that bypasses intermediary controls, poisons caches, or hijacks the request queue. The same response-path leniency can enable response smuggling against an ember-client used as a gateway when the upstream is malicious or compromised. This issue is fixed in versions 0.23.35 and 1.0.0-M47.

CVSS v3
5.4
EG Score
5.4MEDIUMmedium confidence
EG Risk
24
EG Risk 24/100

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)
Severity54% × 45%
Impact severity (EG Severity): CVSS 5.4 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation0.4% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
Automatability0% × 15%
CISA's SSVC Automatable value: no (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at every mission impact level.
Exploitation none (CISA Vulnrichment) · Automatable no (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.
EPSS PROB
0.4%
EPSS %ILE
30th
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 (5.4): severity, escalated by confirmed exploitation. This CVE's 5.4 is its impact severity (EG Severity), not escalated.

EG Severity
5.4 MEDIUMCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.GitHub Security Advisory CVSS
EG Likelihood
0.4% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-10-31). 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 every mission impact level.CISA BOD 26-04: 60 days if the affected system is publicly exposed; Fix on system upgrade 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 every mission impact level.

A fix is available. Apply it within your standard update timelines.

Exploitation none (CISA Vulnrichment) · Automatable no (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)60 days if the affected system is publicly exposed; Fix on system upgrade if it is not.

The score's inputs: In CISA KEV no (CISA's KEV catalog) · Automatable no (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 16, 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 d78612a5abd5 (http4s/http4s)

Patch available: http4s/http4s v0.23.35 (contains commit d78612a5abd5)

https://github.com/http4s/http4s/commit/d78612a5abd5a2547487598d3342be05573e16f0
GitHub advisoryMentions a patch (unverified)

Ember chunk parser lenience (TE.TE request smuggling) · Advisory · http4s/http4s · GitHub

https://github.com/http4s/http4s/security/advisories/GHSA-jrpm-956j-96jg

Vendor Advisories for CVE-2026-69216(1)

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

Patch Availability(2)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
mavenorg.http4s:http4s-ember-core_2.12 @ 0.23.35 (fixes <= 0.23.34)—ghsa
mavenorg.http4s:http4s-ember-core_2.13 @ 1.0.0-M47 (fixes >= 1.0.0-M1, <= 1.0.0-M46)—ghsa

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Affected Packages

(3 across 1 ecosystem)
Maven(3)
PackageVulnerable rangeFix by version rangeDependents
org.http4s:http4s-ember-core_2.120.10.0-M10 ... 0.23.9 (114 versions)
  • every version up to 0.23.35: fixed in 0.23.35
—
org.http4s:http4s-ember-core_2.131.0.0-M10 ... 1.0.0-M9 (43 versions)
  • every version up to 0.23.35: fixed in 0.23.35
  • 1.0.0-M1 up to 1.0.0-M47: fixed in 1.0.0-M47
—
org.http4s:http4s-ember-core_31.0.0-M22 ... 1.0.0-M46 (24 versions)
  • every version up to 0.23.35: fixed in 0.23.35
  • 1.0.0-M1 up to 1.0.0-M47: fixed in 1.0.0-M47
—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 10× in last 7d / 46× 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 0.4% · 30th percentile
  2. 2026-11-01 07:40 UTCGHSA enrichmentGHSA-jrpm-956j-96jg · GitHub severity MODERATE · GitHub CVSS 5.4
  3. 2026-11-01 07:40 UTCEG score recompute
  4. 2026-10-31 16:33 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  5. 2026-10-30 16:35 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  6. 2026-10-30 07:25 UTCOSV refresh
  7. 2026-10-29 16:33 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  8. 2026-10-28 16:33 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  9. 2026-10-27 16:32 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  10. 2026-10-26 16:32 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  11. 2026-10-25 16:33 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  12. 2026-10-25 14:09 UTCEG score recompute
  13. 2026-10-24 16:33 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  14. 2026-10-23 16:32 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  15. 2026-10-22 19:31 UTCEG score recompute
  16. 2026-10-22 16:35 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  17. 2026-10-21 16:33 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  18. 2026-10-20 16:33 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  19. 2026-10-19 16:32 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  20. 2026-10-18 16:32 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  21. 2026-10-18 03:19 UTCEG score recompute
  22. 2026-10-17 16:35 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  23. 2026-10-16 16:43 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  24. 2026-10-15 16:32 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  25. 2026-10-14 16:33 UTCEPSS rescoreEPSS 0.4% · 28th percentile
Show 49 more
  1. 2026-10-13 16:35 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  2. 2026-10-12 16:34 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  3. 2026-10-12 15:44 UTCEG score recompute
  4. 2026-10-11 19:29 UTCEG score recompute
  5. 2026-10-11 16:45 UTCEG score recompute
  6. 2026-10-11 14:05 UTCEG score recompute
  7. 2026-10-11 13:49 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  8. 2026-10-10 22:54 UTCEG score recompute
  9. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  10. 2026-10-09 21:44 UTCEG score recompute
  11. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  12. 2026-10-08 22:12 UTCEG score recompute
  13. 2026-10-08 17:13 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  14. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  15. 2026-10-06 15:45 UTCEG score recompute
  16. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  17. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  18. 2026-10-05 16:14 UTCEG score recompute
  19. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  20. 2026-10-03 16:14 UTCEG score recompute
  21. 2026-10-03 14:26 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  22. 2026-10-02 17:56 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  23. 2026-10-02 16:42 UTCEG score recompute
  24. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  25. 2026-09-30 17:04 UTCEG score recompute
  26. 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  27. 2026-09-29 16:53 UTCEG score recompute
  28. 2026-09-28 17:07 UTCEG score recompute
  29. 2026-09-28 13:52 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  30. 2026-09-27 17:33 UTCEG score recompute
  31. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  32. 2026-09-26 18:01 UTCEG score recompute
  33. 2026-09-26 15:59 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  34. 2026-09-24 18:09 UTCEG score recompute
  35. 2026-09-23 17:54 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  36. 2026-09-22 18:21 UTCEG score recompute
  37. 2026-09-21 21:09 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  38. 2026-09-21 18:49 UTCEG score recompute
  39. 2026-09-20 20:16 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  40. 2026-09-19 19:44 UTCEG score recompute
  41. 2026-09-18 20:12 UTCEG score recompute
  42. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  43. 2026-09-17 20:38 UTCEG score recompute
  44. 2026-09-16 14:25 UTCEG score recompute
  45. 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  46. 2026-09-16 14:01 UTCEG score recompute
  47. 2026-09-15 19:32 UTCEG score recompute
  48. 2026-09-15 19:13 UTCEG score recomputeFirst assessed: 5.4 MEDIUM
  49. 2026-09-15 19:12 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-69216?
CVE-2026-69216 is a medium-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, Ember’s chunk decoder trims the chunk-size token and accepts leading plus or minus signs instead of requiring one or more hexadecimal digits followed by the required CRLF. When an intermediary forwards chunked data…
When was the CVE record for CVE-2026-69216 published?
The CVE record for CVE-2026-69216 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 16, 2026; the record at its source may have been updated since.
Is CVE-2026-69216 actively exploited?
CVE-2026-69216 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.4% probability of exploitation in the next 30 days (30th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-69216?
CVE-2026-69216 has a CVSS base score of 5.4 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-69216?
A fix for CVE-2026-69216 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-69216 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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