CVE Explorer
CVE-2026-45409
Internationalized Domain Names in Applications (IDNA) for Python provides support for Internationalized Domain Names in Applications (IDNA) and Unicode IDNA Compatibility Processing. In versions prior to 3.15, payloads such as `"\u0660" * N` or `"\u30fb" * N + "\u6f22"` utilize the `valid_contexto` function prior to length rejection, and for high values of `N` will take a long time to process. This is the same issue as CVE-2024-3651, however the original remediation in 2024 was not a complete fi
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
0
Affected products and versions
1 source assertion{"product":"idna","vendor":"kjd","versions":[{"status":"affected","version":"< 3.15"}]}
- cve_program_cvelist_v5affectedurn:baitaphish:normalized-source-record:v2:b368a83a4804d71266c67ee9afc40f8c5514c734f02a9e6ea98fa0388821ffbd · sha256:6ac4ad90391f427a… · /containers/cna/affected/0
Provider-owned CVSS observations
1 source assertion{"metric":{"attackComplexity":"LOW","attackRequirements":"NONE","attackVector":"NETWORK","baseScore":6.9,"baseSeverity":"MEDIUM","privilegesRequired":"NONE","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"NONE","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N","version":"4.0","vulnAvailabilityImpact":"LOW","vulnConfidentialityImpact":"NONE","vulnIntegrityImpact":"NONE"},"metric_type":"cvssV4_0"}
- cve_program_cvelist_v5cvssurn:baitaphish:normalized-source-record:v2:b368a83a4804d71266c67ee9afc40f8c5514c734f02a9e6ea98fa0388821ffbd · sha256:6ac4ad90391f427a… · /containers/cna/metrics/0/cvssV4_0
CWE assertions
1 source assertion{"cweId":"CWE-1333","description":"CWE-1333: Inefficient Regular Expression Complexity","lang":"en","type":"CWE"}
- cve_program_cvelist_v5cweurn:baitaphish:normalized-source-record:v2:b368a83a4804d71266c67ee9afc40f8c5514c734f02a9e6ea98fa0388821ffbd · sha256:6ac4ad90391f427a… · /containers/cna/problemTypes/0/descriptions/0
Source references
1 source assertion{"name":"https://github.com/kjd/idna/security/advisories/GHSA-65pc-fj4g-8rjx","tags":["x_refsource_CONFIRM"],"url":"https://github.com/kjd/idna/security/advisories/GHSA-65pc-fj4g-8rjx"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:b368a83a4804d71266c67ee9afc40f8c5514c734f02a9e6ea98fa0388821ffbd · sha256:6ac4ad90391f427a… · /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.