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CVE-2026-34226

A flaw was found in Happy DOM, a JavaScript implementation of a web browser without its graphical user interface. This vulnerability allows for information disclosure where cookies from the current page's origin can be inadvertently attached to network requests made to a different destination. This occurs when the `fetch` function is used with the `credentials: "include"` option, potentially leading to the leakage of sensitive user data to unintended recipients.
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:41443e27f2621cabe98b27dfb1d5bf55ef8f9bac5db162a99c5874604907ba04
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
2

Preserved source conflicts

No provider value was silently selected as the winner.

affected · 3 assertions

{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/a:redhat:ansible_automation_platform:2"],"defaultStatus":"affected","packageName":"ansible-automation-platform-26/gateway-rhel9","product":"Red Hat Ansible Automation Platform 2","vendor":"Red Hat"}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:26d28c58c95a623b5a8c4890e15e2c0a49eac89867064f7861bc4bc544aabff0 · sha256:bb7245a303daffc6… · /containers/adp/1/affected/0

{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/a:redhat:openshift:4"],"defaultStatus":"unaffected","packageName":"openshift4/ose-agent-installer-ui-rhel9","product":"Red Hat OpenShift Container Platform 4","vendor":"Red Hat"}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:26d28c58c95a623b5a8c4890e15e2c0a49eac89867064f7861bc4bc544aabff0 · sha256:bb7245a303daffc6… · /containers/adp/1/affected/1

{"product":"happy-dom","vendor":"capricorn86","versions":[{"status":"affected","version":"< 20.8.9"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:26d28c58c95a623b5a8c4890e15e2c0a49eac89867064f7861bc4bc544aabff0 · sha256:bb7245a303daffc6… · /containers/cna/affected/0
cwe · 3 assertions

{"cweId":"CWE-359","description":"CWE-359: Exposure of Private Personal Information to an Unauthorized Actor","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:26d28c58c95a623b5a8c4890e15e2c0a49eac89867064f7861bc4bc544aabff0 · sha256:bb7245a303daffc6… · /containers/cna/problemTypes/1/descriptions/0

{"cweId":"CWE-201","description":"CWE-201: Insertion of Sensitive Information Into Sent Data","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:26d28c58c95a623b5a8c4890e15e2c0a49eac89867064f7861bc4bc544aabff0 · sha256:bb7245a303daffc6… · /containers/cna/problemTypes/0/descriptions/0

{"cweId":"CWE-201","description":"Insertion of Sensitive Information Into Sent Data","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:26d28c58c95a623b5a8c4890e15e2c0a49eac89867064f7861bc4bc544aabff0 · sha256:bb7245a303daffc6… · /containers/adp/1/problemTypes/0/descriptions/0

Affected products and versions

3 source assertions
{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/a:redhat:ansible_automation_platform:2"],"defaultStatus":"affected","packageName":"ansible-automation-platform-26/gateway-rhel9","product":"Red Hat Ansible Automation Platform 2","vendor":"Red Hat"}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:26d28c58c95a623b5a8c4890e15e2c0a49eac89867064f7861bc4bc544aabff0 · sha256:bb7245a303daffc6… · /containers/adp/1/affected/0
{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/a:redhat:openshift:4"],"defaultStatus":"unaffected","packageName":"openshift4/ose-agent-installer-ui-rhel9","product":"Red Hat OpenShift Container Platform 4","vendor":"Red Hat"}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:26d28c58c95a623b5a8c4890e15e2c0a49eac89867064f7861bc4bc544aabff0 · sha256:bb7245a303daffc6… · /containers/adp/1/affected/1
{"product":"happy-dom","vendor":"capricorn86","versions":[{"status":"affected","version":"< 20.8.9"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:26d28c58c95a623b5a8c4890e15e2c0a49eac89867064f7861bc4bc544aabff0 · sha256:bb7245a303daffc6… · /containers/cna/affected/0

Provider-owned CVSS observations

2 source assertions
{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":7.5,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:26d28c58c95a623b5a8c4890e15e2c0a49eac89867064f7861bc4bc544aabff0 · sha256:bb7245a303daffc6… · /containers/adp/1/metrics/1/cvssV3_1
{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":7.5,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:26d28c58c95a623b5a8c4890e15e2c0a49eac89867064f7861bc4bc544aabff0 · sha256:bb7245a303daffc6… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

3 source assertions
{"cweId":"CWE-359","description":"CWE-359: Exposure of Private Personal Information to an Unauthorized Actor","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:26d28c58c95a623b5a8c4890e15e2c0a49eac89867064f7861bc4bc544aabff0 · sha256:bb7245a303daffc6… · /containers/cna/problemTypes/1/descriptions/0
{"cweId":"CWE-201","description":"CWE-201: Insertion of Sensitive Information Into Sent Data","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:26d28c58c95a623b5a8c4890e15e2c0a49eac89867064f7861bc4bc544aabff0 · sha256:bb7245a303daffc6… · /containers/cna/problemTypes/0/descriptions/0
{"cweId":"CWE-201","description":"Insertion of Sensitive Information Into Sent Data","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:26d28c58c95a623b5a8c4890e15e2c0a49eac89867064f7861bc4bc544aabff0 · sha256:bb7245a303daffc6… · /containers/adp/1/problemTypes/0/descriptions/0

Source references

8 source assertions
{"tags":["vdb-entry","x_refsource_REDHAT"],"url":"https://access.redhat.com/security/cve/CVE-2026-34226"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:26d28c58c95a623b5a8c4890e15e2c0a49eac89867064f7861bc4bc544aabff0 · sha256:bb7245a303daffc6… · /containers/adp/1/references/0
{"name":"RHBZ#2452519","tags":["issue-tracking","x_refsource_REDHAT"],"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2452519"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:26d28c58c95a623b5a8c4890e15e2c0a49eac89867064f7861bc4bc544aabff0 · sha256:bb7245a303daffc6… · /containers/adp/1/references/1
{"name":"https://github.com/capricorn86/happy-dom/blob/f8d8cad41e9722fab9eefb9dfb3cca696462e908/packages/happy-dom/src/fetch/utilities/FetchRequestHeaderUtility.ts","tags":["x_refsource_MISC"],"url":"https://github.com/capricorn86/happy-dom/blob/f8d8cad41e9722fab9eefb9dfb3cca696462e908/packages/happy-dom/src/fetch/utilities/FetchRequestHeaderUtility.ts"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:26d28c58c95a623b5a8c4890e15e2c0a49eac89867064f7861bc4bc544aabff0 · sha256:bb7245a303daffc6… · /containers/cna/references/3
{"name":"https://github.com/capricorn86/happy-dom/commit/68324c21d7b98f53f7bb5a7b3e185bda7106e751","tags":["x_refsource_MISC"],"url":"https://github.com/capricorn86/happy-dom/commit/68324c21d7b98f53f7bb5a7b3e185bda7106e751"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:26d28c58c95a623b5a8c4890e15e2c0a49eac89867064f7861bc4bc544aabff0 · sha256:bb7245a303daffc6… · /containers/cna/references/2
{"name":"https://github.com/capricorn86/happy-dom/pull/2117","tags":["x_refsource_MISC"],"url":"https://github.com/capricorn86/happy-dom/pull/2117"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:26d28c58c95a623b5a8c4890e15e2c0a49eac89867064f7861bc4bc544aabff0 · sha256:bb7245a303daffc6… · /containers/cna/references/1
{"name":"https://github.com/capricorn86/happy-dom/releases/tag/v20.8.9","tags":["x_refsource_MISC"],"url":"https://github.com/capricorn86/happy-dom/releases/tag/v20.8.9"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:26d28c58c95a623b5a8c4890e15e2c0a49eac89867064f7861bc4bc544aabff0 · sha256:bb7245a303daffc6… · /containers/cna/references/4
{"name":"https://github.com/capricorn86/happy-dom/security/advisories/GHSA-w4gp-fjgq-3q4g","tags":["x_refsource_CONFIRM"],"url":"https://github.com/capricorn86/happy-dom/security/advisories/GHSA-w4gp-fjgq-3q4g"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:26d28c58c95a623b5a8c4890e15e2c0a49eac89867064f7861bc4bc544aabff0 · sha256:bb7245a303daffc6… · /containers/cna/references/0
{"tags":["x_sadp-csaf-vex"],"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-34226.json"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:26d28c58c95a623b5a8c4890e15e2c0a49eac89867064f7861bc4bc544aabff0 · sha256:bb7245a303daffc6… · /containers/adp/1/references/2

Attribution and limitations

  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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