CVE-2026-59896

MEDIUMPre-NVD 6.56.5
EchelonGraph scoreMEDIUM confidence

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

This medium-severity CVE scores 6.5 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.3% (21st 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
6.5EG
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: 0.3%CVSS: 6.5Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

Hono is a Web application framework that provides support for any JavaScript runtime. From 4.11.8 before 4.12.27, hono/jsx did not isolate context values per request during server-side rendering, allowing createContext, useContext, jsxRenderer, or useRequestContext data from a different in-flight request to be used after an await in an async component. This issue is fixed in version 4.12.27.

CVSS v3
6.5
EG Score
6.5MEDIUMmedium confidence
EG Risk
29
EG Risk 29/100

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)
Severity65% × 45%
Impact severity (EG Severity): CVSS 6.5 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation0.3% × 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
0.3%
EPSS %ILE
21st
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 (6.5): severity, escalated by confirmed exploitation. This CVE's 6.5 is its impact severity (EG Severity), not escalated.

EG Severity
6.5 MEDIUMCVSS-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
0.3% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-10-17). 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: 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.

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

July 8, 2026

Last Modified

July 10, 2026

Advisory Details (3)

Auto-updated Jul 8, 2026
Patch available. Sources: github_release, github, github_commit.
GitHub advisoryMentions a patch (unverified)

hono/jsx does not isolate context per request, leading to cross-request data disclosure · Advisory · honojs/hono · GitHub

https://github.com/honojs/hono/security/advisories/GHSA-hvrm-45r6-mjfj
GitHub release Patch Available

v4.12.27

Patch available: honojs/hono v4.12.27

https://github.com/honojs/hono/releases/tag/v4.12.27
GitHub commit Patch Available

commit fab3b1363933 (honojs/hono)

Patch available: honojs/hono v4.12.27 (contains commit fab3b1363933)

https://github.com/honojs/hono/commit/fab3b13639339cbd5ba1166a5b23d9ac30c5f64f

Vendor Advisories for CVE-2026-59896(1)

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

Affected Packages

(1 across 1 ecosystem)
npm(1)
PackageVulnerable rangeFix by version rangeDependents
hono—
  • 4.11.8 up to 4.12.27: fixed in 4.12.27
—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 8× in last 7d / 36× 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.

Showing the most recent 100 of 145 refreshes on record for this CVE.

A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. None are among the latest 100 rows. The 45 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-19 16:32 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  2. 2026-10-18 16:32 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  3. 2026-10-18 03:27 UTCEG score recompute
  4. 2026-10-17 16:35 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  5. 2026-10-16 16:43 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  6. 2026-10-15 16:32 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  7. 2026-10-14 16:33 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  8. 2026-10-13 16:34 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  9. 2026-10-12 16:34 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  10. 2026-10-12 15:52 UTCEG score recompute
  11. 2026-10-11 19:36 UTCEG score recompute
  12. 2026-10-11 16:51 UTCEG score recompute
  13. 2026-10-11 14:13 UTCEG score recompute
  14. 2026-10-11 13:49 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  15. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  16. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  17. 2026-10-08 17:13 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  18. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  19. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  20. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  21. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  22. 2026-10-03 14:26 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  23. 2026-10-02 17:56 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  24. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  25. 2026-10-01 16:11 UTCEG score recompute
Show 75 more
  1. 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  2. 2026-09-29 15:22 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  3. 2026-09-28 13:51 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  4. 2026-09-28 13:22 UTCEG score recompute
  5. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  6. 2026-09-26 15:59 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  7. 2026-09-24 14:04 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  8. 2026-09-24 11:48 UTCEG score recompute
  9. 2026-09-23 17:54 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  10. 2026-09-23 06:10 UTCEG score recompute
  11. 2026-09-20 20:16 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  12. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  13. 2026-09-18 05:43 UTCEG score recompute
  14. 2026-09-17 19:31 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  15. 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  16. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  17. 2026-09-15 03:11 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  18. 2026-09-14 08:41 UTCEG score recompute
  19. 2026-09-13 16:47 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  20. 2026-09-13 08:25 UTCEG score recompute
  21. 2026-09-12 03:35 UTCEG score recompute
  22. 2026-09-11 14:53 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  23. 2026-09-10 09:35 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  24. 2026-09-08 22:01 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  25. 2026-09-07 16:01 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  26. 2026-09-06 13:47 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  27. 2026-09-05 22:48 UTCEG score recompute
  28. 2026-09-04 05:07 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  29. 2026-09-02 14:12 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  30. 2026-09-01 13:54 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  31. 2026-09-01 04:40 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  32. 2026-08-30 19:17 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  33. 2026-08-30 07:33 UTCEG score recompute
  34. 2026-08-30 01:22 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  35. 2026-08-28 21:42 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  36. 2026-08-27 21:50 UTCEG score recompute
  37. 2026-08-27 14:25 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  38. 2026-08-26 14:46 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  39. 2026-08-26 08:24 UTCEG score recompute
  40. 2026-08-25 13:49 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  41. 2026-08-25 04:37 UTCEG score recompute
  42. 2026-08-23 04:04 UTCEG score recompute
  43. 2026-08-23 00:19 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  44. 2026-08-22 03:47 UTCEG score recompute
  45. 2026-08-21 23:49 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  46. 2026-08-21 02:18 UTCEG score recompute
  47. 2026-08-20 22:55 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  48. 2026-08-20 01:59 UTCEG score recompute
  49. 2026-08-19 17:04 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  50. 2026-08-18 22:53 UTCEG score recompute
  51. 2026-08-18 13:48 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  52. 2026-08-16 19:38 UTCEG score recompute
  53. 2026-08-16 14:56 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  54. 2026-08-16 02:14 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  55. 2026-08-15 18:42 UTCEG score recompute
  56. 2026-08-15 01:30 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  57. 2026-08-14 18:24 UTCEG score recompute
  58. 2026-08-13 22:00 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  59. 2026-08-12 17:50 UTCEG score recompute
  60. 2026-08-12 13:51 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  61. 2026-08-11 17:33 UTCEG score recompute
  62. 2026-08-11 00:00 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  63. 2026-08-09 16:59 UTCEG score recompute
  64. 2026-08-09 13:46 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  65. 2026-08-08 16:43 UTCEG score recompute
  66. 2026-08-08 16:37 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  67. 2026-08-06 16:09 UTCEG score recompute
  68. 2026-08-06 13:47 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  69. 2026-08-05 19:17 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  70. 2026-08-04 15:14 UTCEG score recompute
  71. 2026-08-04 15:10 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  72. 2026-08-03 14:57 UTCEG score recompute
  73. 2026-08-03 10:36 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  74. 2026-08-02 14:41 UTCEG score recompute
  75. 2026-08-02 02:27 UTCEPSS rescoreEPSS 0.2% · 9th percentile

Frequently asked(5)

What is CVE-2026-59896?
CVE-2026-59896 is a medium-severity vulnerability; its CVE record was published on July 8, 2026. Hono is a Web application framework that provides support for any JavaScript runtime. From 4.11.8 before 4.12.27, hono/jsx did not isolate context values per request during server-side rendering, allowing createContext, useContext, jsxRenderer, or useRequestContext data from a different in-flight…
When was the CVE record for CVE-2026-59896 published?
The CVE record for CVE-2026-59896 was published on July 8, 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 July 10, 2026; the record at its source may have been updated since.
Is CVE-2026-59896 actively exploited?
CVE-2026-59896 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.3% probability of exploitation in the next 30 days (21st percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-59896?
CVE-2026-59896 has a CVSS base score of 6.5 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-59896?
A fix for CVE-2026-59896 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-59896 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-59896

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