CVE Explorer

CVE-2026-21873

NiceGUI is a Python-based UI framework. From versions 2.22.0 to 3.4.1, an unsafe implementation in the pushstate event listener used by ui.sub_pages allows an attacker to manipulate the fragment identifier of the URL, which they can do despite being cross-site, using an iframe. This issue has been patched in version 3.5.0.

Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:f152f733dc3a97609b7af32188dd7d197717afa8c00ffaa3bb05df71df8ad49d

Known exploited

Not asserted

Disputed

Stale source

Conflicts

Affected products and versions

1 source assertion

{"product":"nicegui","vendor":"zauberzeug","versions":[{"status":"affected","version":">= 2.22.0, < 3.5.0"}]}

cve_program_cvelist_v5affected
urn:baitaphish:normalized-source-record:v2:4753893f804b522e9f53f2dcd5dc82e373856fa5de6a88411846579b7b2af35e · sha256:6d081a595ab66205… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion

{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":7.2,"baseSeverity":"HIGH","confidentialityImpact":"LOW","integrityImpact":"LOW","privilegesRequired":"NONE","scope":"CHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N","version":"3.1"},"metric_type":"cvssV3_1"}

cve_program_cvelist_v5cvss
urn:baitaphish:normalized-source-record:v2:4753893f804b522e9f53f2dcd5dc82e373856fa5de6a88411846579b7b2af35e · sha256:6d081a595ab66205… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

1 source assertion

{"cweId":"CWE-79","description":"CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')","lang":"en","type":"CWE"}

cve_program_cvelist_v5cwe
urn:baitaphish:normalized-source-record:v2:4753893f804b522e9f53f2dcd5dc82e373856fa5de6a88411846579b7b2af35e · sha256:6d081a595ab66205… · /containers/cna/problemTypes/0/descriptions/0

Source references

2 source assertions

{"name":"https://github.com/zauberzeug/nicegui/releases/tag/v3.5.0","tags":["x_refsource_MISC"],"url":"https://github.com/zauberzeug/nicegui/releases/tag/v3.5.0"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:4753893f804b522e9f53f2dcd5dc82e373856fa5de6a88411846579b7b2af35e · sha256:6d081a595ab66205… · /containers/cna/references/1

{"name":"https://github.com/zauberzeug/nicegui/security/advisories/GHSA-mhpg-c27v-6mxr","tags":["x_refsource_CONFIRM"],"url":"https://github.com/zauberzeug/nicegui/security/advisories/GHSA-mhpg-c27v-6mxr"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:4753893f804b522e9f53f2dcd5dc82e373856fa5de6a88411846579b7b2af35e · sha256:6d081a595ab66205… · /containers/cna/references/0

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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