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CVE-2026-12856

A flaw was found in the vscode-java extension, which provides Java language support for Visual Studio Code. The extension incorrectly trusts all Markdown content in JavaDoc hovers, allowing a malicious Java file to include hidden commands. If a user clicks a specially crafted link within a JavaDoc hover popup, an attacker can execute arbitrary VS Code commands, which can lead to full system compromise in trusted workspaces.
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:a9b9e71eeb20a2a70e2ca66e750e80dc47d5efedbff0592631a41cdb849421fb
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
0

Affected products and versions

2 source assertions
{"collectionURL":"https://catalog.redhat.com/software/containers/","cpes":["cpe:/a:redhat:openshift_devspaces:3.29::el9"],"defaultStatus":"affected","packageName":"devspaces/pluginregistry-rhel9","product":"Red Hat OpenShift Dev Spaces 3.29","vendor":"Red Hat","versions":[{"lessThan":"*","status":"unaffected","version":"1782989367","versionType":"rpm"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:64ca07b5dc84fcdee40312604197de982f24c8df864fc49cdeed137dffd25302 · sha256:6be94987546e3439… · /containers/adp/1/affected/0
{"collectionURL":"https://catalog.redhat.com/software/containers/","cpes":["cpe:/a:redhat:openshift_devspaces:3.29::el9"],"defaultStatus":"affected","packageName":"devspaces/pluginregistry-rhel9","product":"Red Hat OpenShift Dev Spaces 3.29","vendor":"Red Hat","versions":[{"lessThan":"*","status":"unaffected","version":"1782989367","versionType":"rpm"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:64ca07b5dc84fcdee40312604197de982f24c8df864fc49cdeed137dffd25302 · sha256:6be94987546e3439… · /containers/cna/affected/0

Provider-owned CVSS observations

2 source assertions
{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":8.8,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"REQUIRED","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:64ca07b5dc84fcdee40312604197de982f24c8df864fc49cdeed137dffd25302 · sha256:6be94987546e3439… · /containers/adp/1/metrics/1/cvssV3_1
{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":8.8,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"REQUIRED","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:64ca07b5dc84fcdee40312604197de982f24c8df864fc49cdeed137dffd25302 · sha256:6be94987546e3439… · /containers/cna/metrics/1/cvssV3_1

CWE assertions

2 source assertions
{"cweId":"CWE-88","description":"Improper Neutralization of Argument Delimiters in a Command ('Argument Injection')","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:64ca07b5dc84fcdee40312604197de982f24c8df864fc49cdeed137dffd25302 · sha256:6be94987546e3439… · /containers/adp/1/problemTypes/0/descriptions/0
{"cweId":"CWE-88","description":"Improper Neutralization of Argument Delimiters in a Command ('Argument Injection')","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:64ca07b5dc84fcdee40312604197de982f24c8df864fc49cdeed137dffd25302 · sha256:6be94987546e3439… · /containers/cna/problemTypes/0/descriptions/0

Source references

8 source assertions
{"name":"RHSA-2026:36820","tags":["vendor-advisory","x_refsource_REDHAT"],"url":"https://access.redhat.com/errata/RHSA-2026:36820"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:64ca07b5dc84fcdee40312604197de982f24c8df864fc49cdeed137dffd25302 · sha256:6be94987546e3439… · /containers/cna/references/0
{"tags":["vendor-advisory","x_refsource_REDHAT"],"url":"https://access.redhat.com/errata/RHSA-2026:36820"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:64ca07b5dc84fcdee40312604197de982f24c8df864fc49cdeed137dffd25302 · sha256:6be94987546e3439… · /containers/adp/1/references/3
{"tags":["vdb-entry","x_refsource_REDHAT"],"url":"https://access.redhat.com/security/cve/CVE-2026-12856"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:64ca07b5dc84fcdee40312604197de982f24c8df864fc49cdeed137dffd25302 · sha256:6be94987546e3439… · /containers/adp/1/references/0
{"tags":["vdb-entry","x_refsource_REDHAT"],"url":"https://access.redhat.com/security/cve/CVE-2026-12856"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:64ca07b5dc84fcdee40312604197de982f24c8df864fc49cdeed137dffd25302 · sha256:6be94987546e3439… · /containers/cna/references/1
{"name":"RHBZ#2491278","tags":["issue-tracking","x_refsource_REDHAT"],"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2491278"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:64ca07b5dc84fcdee40312604197de982f24c8df864fc49cdeed137dffd25302 · sha256:6be94987546e3439… · /containers/cna/references/2
{"name":"RHBZ#2491278","tags":["issue-tracking","x_refsource_REDHAT"],"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2491278"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:64ca07b5dc84fcdee40312604197de982f24c8df864fc49cdeed137dffd25302 · sha256:6be94987546e3439… · /containers/adp/1/references/1
{"url":"https://github.com/redhat-developer/vscode-java/security/advisories/GHSA-7qv8-6qrw-3crv"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:64ca07b5dc84fcdee40312604197de982f24c8df864fc49cdeed137dffd25302 · sha256:6be94987546e3439… · /containers/cna/references/3
{"tags":["x_sadp-csaf-vex"],"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-12856.json"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:64ca07b5dc84fcdee40312604197de982f24c8df864fc49cdeed137dffd25302 · sha256:6be94987546e3439… · /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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