CVE Explorer

CVE-2026-21874

NiceGUI is a Python-based UI framework. From versions v2.10.0 to 3.4.1, an unauthenticated attacker can exhaust Redis connections by repeatedly opening and closing browser tabs on any NiceGUI application using Redis-backed storage. Connections are never released, leading to service degradation when Redis hits its connection limit. NiceGUI continues accepting new connections - errors are logged but the app stays up with broken storage functionality. This issue has been patched in version 3.5.0.

Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:0e4dba6b4b136653ad211f954573f49a258147c56ec89212c8febd42e1220fc4

Known exploited

Not asserted

Disputed

Stale source

Conflicts

Affected products and versions

1 source assertion

{"product":"nicegui","vendor":"zauberzeug","versions":[{"status":"affected","version":">= 2.10.0, < 3.5.0"}]}

cve_program_cvelist_v5affected
urn:baitaphish:normalized-source-record:v2:666e9e0c209ac04bb4d68f72a33a3481ce74b411c7047ac9918547e11fd1dbc4 · sha256:865bbbc76e70f5ce… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion

{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"LOW","baseScore":5.3,"baseSeverity":"MEDIUM","confidentialityImpact":"NONE","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","version":"3.1"},"metric_type":"cvssV3_1"}

cve_program_cvelist_v5cvss
urn:baitaphish:normalized-source-record:v2:666e9e0c209ac04bb4d68f72a33a3481ce74b411c7047ac9918547e11fd1dbc4 · sha256:865bbbc76e70f5ce… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

1 source assertion

{"cweId":"CWE-772","description":"CWE-772: Missing Release of Resource after Effective Lifetime","lang":"en","type":"CWE"}

cve_program_cvelist_v5cwe
urn:baitaphish:normalized-source-record:v2:666e9e0c209ac04bb4d68f72a33a3481ce74b411c7047ac9918547e11fd1dbc4 · sha256:865bbbc76e70f5ce… · /containers/cna/problemTypes/0/descriptions/0

Source references

4 source assertions

{"name":"https://github.com/zauberzeug/nicegui/commit/6c52eb2c90c4b67387c025b29646b4bc1578eb83","tags":["x_refsource_MISC"],"url":"https://github.com/zauberzeug/nicegui/commit/6c52eb2c90c4b67387c025b29646b4bc1578eb83"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:666e9e0c209ac04bb4d68f72a33a3481ce74b411c7047ac9918547e11fd1dbc4 · sha256:865bbbc76e70f5ce… · /containers/cna/references/1

{"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:v2:666e9e0c209ac04bb4d68f72a33a3481ce74b411c7047ac9918547e11fd1dbc4 · sha256:865bbbc76e70f5ce… · /containers/cna/references/2

{"tags":["exploit"],"url":"https://github.com/zauberzeug/nicegui/security/advisories/GHSA-mp55-g7pj-rvm2"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:666e9e0c209ac04bb4d68f72a33a3481ce74b411c7047ac9918547e11fd1dbc4 · sha256:865bbbc76e70f5ce… · /containers/adp/0/references/0

{"name":"https://github.com/zauberzeug/nicegui/security/advisories/GHSA-mp55-g7pj-rvm2","tags":["x_refsource_CONFIRM"],"url":"https://github.com/zauberzeug/nicegui/security/advisories/GHSA-mp55-g7pj-rvm2"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:666e9e0c209ac04bb4d68f72a33a3481ce74b411c7047ac9918547e11fd1dbc4 · sha256:865bbbc76e70f5ce… · /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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