Vulnerability-Lookup

CVE-2026-59896 (GCVE-0-2026-59896)

Vulnerability from cvelistv5 – Published: 2026-07-08 16:08 – Updated: 2026-07-08 16:59

Title

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

Summary

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.

Severity

6.5 (Medium)


                        
                          CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:N

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-07-08 16:49 UTC

CWE

CWE-362 - Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

Assigner

GitHub_M mitre root

References

3 references

URL	Tags
https://github.com/honojs/hono/security/advisorie…	x_refsource_CONFIRM
https://github.com/honojs/hono/commit/fab3b136393…	x_refsource_MISC
https://github.com/honojs/hono/releases/tag/v4.12.27	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version	CPE status
honojs	hono	Affected: >= 4.11.8, < 4.12.27	guessed

Show details on NVD website

JSON

To clipboard

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                "timestamp": "2026-07-08T16:49:50.977740Z",
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        }
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          }
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    "redhat_vex": {
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      "product_status:known_affected": "4",
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      "title": "hono: Hono: Information disclosure due to improper context isolation in server-side rendering",
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cleanstart-2026-fv05780

Vulnerability from cleanstart

Published

2026-09-01 11:17

Modified

2026-09-04 11:14

Summary

Security fixes in langfuse 3.213.0-r1

Details

Package langfuse version 3.213.0-r1 fixes 24 vulnerabilities: CVE-2026-59895, CVE-2026-59896, CVE-2026-59897, CVE-2026-69207, CVE-2026-71848...

References

URL

Type

https://github.com/langfuse/langfuse

WEB

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "CleanStart",
        "name": "langfuse"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "3.213.0-r1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "3.213.0-r1"
      ]
    }
  ],
  "credits": [],
  "database_specific": {},
  "details": "Package langfuse version 3.213.0-r1 fixes 24 vulnerabilities: CVE-2026-59895, CVE-2026-59896, CVE-2026-59897, CVE-2026-69207, CVE-2026-71848...",
  "id": "CLEANSTART-2026-FV05780",
  "modified": "2026-09-04T11:14:10Z",
  "published": "2026-09-01T11:17:16Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/langfuse/langfuse"
    }
  ],
  "related": [],
  "schema_version": "1.7.3",
  "summary": "Security fixes in langfuse 3.213.0-r1",
  "upstream": [
    "CVE-2026-59895",
    "CVE-2026-59896",
    "CVE-2026-59897",
    "CVE-2026-69207",
    "CVE-2026-71848",
    "CVE-2026-71850",
    "CVE-2026-71849",
    "ghsa-5p4m-2wfm-xmqj",
    "CVE-2026-67213",
    "CVE-2026-67214",
    "CVE-2026-64641",
    "CVE-2026-64642",
    "CVE-2026-64645",
    "CVE-2026-64649",
    "CVE-2026-64643",
    "CVE-2026-64644",
    "CVE-2026-64646",
    "CVE-2026-64647",
    "CVE-2026-64648",
    "CVE-2026-13697",
    "CVE-2026-14643",
    "CVE-2026-15157",
    "CVE-2026-16728",
    "CVE-2026-16729"
  ]
}

cleanstart-2026-ik31603

Vulnerability from cleanstart

Published

2026-09-01 11:17

Modified

2026-09-04 11:14

Summary

Security fixes in langfuse 3.208.0-r1

Details

Package langfuse version 3.208.0-r1 fixes 24 vulnerabilities: CVE-2026-59895, CVE-2026-59896, CVE-2026-59897, CVE-2026-69207, CVE-2026-71848...

References

URL

Type

https://github.com/langfuse/langfuse

WEB

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "CleanStart",
        "name": "langfuse"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "3.208.0-r1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "3.208.0-r1"
      ]
    }
  ],
  "credits": [],
  "database_specific": {},
  "details": "Package langfuse version 3.208.0-r1 fixes 24 vulnerabilities: CVE-2026-59895, CVE-2026-59896, CVE-2026-59897, CVE-2026-69207, CVE-2026-71848...",
  "id": "CLEANSTART-2026-IK31603",
  "modified": "2026-09-04T11:14:10Z",
  "published": "2026-09-01T11:17:16Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/langfuse/langfuse"
    }
  ],
  "related": [],
  "schema_version": "1.7.3",
  "summary": "Security fixes in langfuse 3.208.0-r1",
  "upstream": [
    "CVE-2026-59895",
    "CVE-2026-59896",
    "CVE-2026-59897",
    "CVE-2026-69207",
    "CVE-2026-71848",
    "CVE-2026-71850",
    "CVE-2026-71849",
    "CVE-2026-67213",
    "CVE-2026-67214",
    "CVE-2026-64641",
    "CVE-2026-64642",
    "CVE-2026-64645",
    "CVE-2026-64649",
    "CVE-2026-64643",
    "CVE-2026-64644",
    "CVE-2026-64646",
    "CVE-2026-64647",
    "CVE-2026-64648",
    "CVE-2026-59877",
    "CVE-2026-13697",
    "CVE-2026-14643",
    "CVE-2026-15157",
    "CVE-2026-16728",
    "CVE-2026-16729"
  ]
}

FKIE_CVE-2026-59896

Vulnerability from fkie_nvd - Published: 2026-07-08 17:17 - Updated: 2026-07-10 19:50

Severity

6.5 (Medium) - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:N

Summary

References

URL	Tags
security-advisories@github.com	https://github.com/honojs/hono/commit/fab3b13639339cbd5ba1166a5b23d9ac30c5f64f	Patch
security-advisories@github.com	https://github.com/honojs/hono/releases/tag/v4.12.27	Release Notes
security-advisories@github.com	https://github.com/honojs/hono/security/advisories/GHSA-hvrm-45r6-mjfj	Vendor Advisory

Impacted products

	Vendor	Product	Version
	hono	hono	*

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "hono",
          "vendor": "honojs",
          "versions": [
            {
              "status": "affected",
              "version": "\u003e= 4.11.8, \u003c 4.12.27"
            }
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        }
      ],
      "source": "security-advisories@github.com"
    }
  ],
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              "matchCriteriaId": "9B42B113-3A7D-419F-BBEF-8EC6D7FDAC41",
              "versionEndExcluding": "4.12.27",
              "versionStartIncluding": "4.11.8",
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            }
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    {
      "lang": "en",
      "value": "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."
    }
  ],
  "id": "CVE-2026-59896",
  "lastModified": "2026-07-10T19:50:53.477",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "HIGH",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 6.5,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "LOW",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 2.2,
        "impactScore": 4.2,
        "source": "security-advisories@github.com",
        "type": "Secondary"
      }
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          "options": [
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            },
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              "automatable": "no"
            },
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              "technicalImpact": "partial"
            }
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          "role": "CISA Coordinator",
          "timestamp": "2026-07-08T16:49:50.977740Z",
          "version": "2.0.3"
        }
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  },
  "published": "2026-07-08T17:17:27.493",
  "references": [
    {
      "source": "security-advisories@github.com",
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        "Patch"
      ],
      "url": "https://github.com/honojs/hono/commit/fab3b13639339cbd5ba1166a5b23d9ac30c5f64f"
    },
    {
      "source": "security-advisories@github.com",
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        "Release Notes"
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      "url": "https://github.com/honojs/hono/releases/tag/v4.12.27"
    },
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Vendor Advisory"
      ],
      "url": "https://github.com/honojs/hono/security/advisories/GHSA-hvrm-45r6-mjfj"
    }
  ],
  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-362"
        }
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      "source": "security-advisories@github.com",
      "type": "Secondary"
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}

GHSA-HVRM-45R6-MJFJ

Vulnerability from github – Published: 2026-07-21 18:34 – Updated: 2026-07-21 18:34

Summary

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

Details

Summary

hono/jsx did not isolate context values per request during server-side rendering. While an async component was suspended on await, its provided context value stayed observable to other requests rendering concurrently, so useContext() could return a value from a different in-flight request.

Details

During server-side rendering, context values were kept in a process-wide structure rather than scoped to each request's render. While an async component awaited, another request entering the same provider could observe or replace the value; when the first render resumed, it could read the other request's context.

This affects the usual ways request-scoped data is passed through a server-rendered JSX tree:

createContext() / useContext()
the jsxRenderer middleware and useRequestContext()

It arises only when context is read after an await inside an async component while requests render concurrently. Reading context synchronously (before any await), purely synchronous rendering, and client-side (DOM) rendering are not affected.

Impact

Under concurrent requests, a response could be rendered with another request's context. A user may receive HTML rendered for a different user, and an authorization check performed after an await may be evaluated against another user's data.

This may lead to:

disclosure of rendered output intended for another user
authorization decisions made with the wrong request's context
cross-request mixing of session or other request-scoped state

Severity

6.5 (Medium)


                  
                    CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:N

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{
  "affected": [
    {
      "package": {
        "ecosystem": "npm",
        "name": "hono"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "4.11.8"
            },
            {
              "fixed": "4.12.27"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-59896"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-362"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-07-21T18:34:19Z",
    "nvd_published_at": "2026-07-08T17:17:27Z",
    "severity": "MODERATE"
  },
  "details": "### Summary\n\n`hono/jsx` did not isolate context values per request during server-side rendering. While an async component was suspended on `await`, its provided context value stayed observable to other requests rendering concurrently, so `useContext()` could return a value from a different in-flight request.\n\n### Details\n\nDuring server-side rendering, context values were kept in a process-wide structure rather than scoped to each request\u0027s render. While an async component awaited, another request entering the same provider could observe or replace the value; when the first render resumed, it could read the other request\u0027s context.\n\nThis affects the usual ways request-scoped data is passed through a server-rendered JSX tree:\n\n- `createContext()` / `useContext()`\n- the `jsxRenderer` middleware and `useRequestContext()`\n\nIt arises only when context is read after an `await` inside an async component while requests render concurrently. Reading context synchronously (before any `await`), purely synchronous rendering, and client-side (DOM) rendering are not affected.\n\n### Impact\n\nUnder concurrent requests, a response could be rendered with another request\u0027s context. A user may receive HTML rendered for a different user, and an authorization check performed after an `await` may be evaluated against another user\u0027s data.\n\nThis may lead to:\n\n- disclosure of rendered output intended for another user\n- authorization decisions made with the wrong request\u0027s context\n- cross-request mixing of session or other request-scoped state",
  "id": "GHSA-hvrm-45r6-mjfj",
  "modified": "2026-07-21T18:34:19Z",
  "published": "2026-07-21T18:34:19Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/honojs/hono/security/advisories/GHSA-hvrm-45r6-mjfj"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-59896"
    },
    {
      "type": "WEB",
      "url": "https://github.com/honojs/hono/commit/fab3b13639339cbd5ba1166a5b23d9ac30c5f64f"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/honojs/hono"
    },
    {
      "type": "WEB",
      "url": "https://github.com/honojs/hono/releases/tag/v4.12.27"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "hono/jsx does not isolate context per request, leading to cross-request data disclosure"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

Action not permitted

CVE-2026-59896 (GCVE-0-2026-59896)

cleanstart-2026-fv05780

Vulnerability from cleanstart

cleanstart-2026-ik31603

Vulnerability from cleanstart

FKIE_CVE-2026-59896

GHSA-HVRM-45R6-MJFJ

Summary

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