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python-idna: idna: Denial of Service via specially crafted long inputs

🗓️ 16 Jun 2026 08:59:09Reported by RedHatType 
redhat
 redhat🔗 access.redhat.com👁 1 Views

Flaw in the idna library causes denial of service from long inputs to encoding due to incomplete fix.

Related
Packages
Refs
ReporterTitlePublishedViews
Family
IBM Security Bulletins		Security Bulletin: There is a vulnerability in idna-3.13-py3-none-any.whl used by IBM Maximo Manage application in IBM Maximo Application Suite (CVE-2026-45409)
26 Jun 202608:02
–ibm
IBM Security Bulletins		Security Bulletin: IBM App Connect Enterprise Certified Container operator and operands are vulnerable to loss of confidentiality and denial of service due to multiple CVEs
2 Jul 202610:42
–ibm
IBM Security Bulletins		Security Bulletin: IBM Cloud Pak for Data System (CPDS 1.0) is affected by a Regular Expression Denial of Service vulnerability due to idna
8 Jul 202611:17
–ibm
IBM Security Bulletins		Security Bulletin: IBM Maximo Application Suite - Visual Inspection component uses idna-3.13-py3-none-any.whl which is vulnerable to CVE-2026-45409.
29 Jun 202615:56
–ibm
IBM Security Bulletins		Security Bulletin: Maximo AI Service uses multiple third party dependencies which are vulnerable to multiple CVEs.
30 Jun 202607:44
–ibm
ATTACKERKB		CVE-2026-45409
5 Jun 202622:06
–attackerkb
Chainguard		CVE-2026-45409 vulnerabilities
21 May 202601:17
–cgr
Circl		CVE-2026-45409
25 May 202602:03
–circl
CNNVD		Internationalized Domain Names in Applications 安全漏洞
5 Jun 202600:00
–cnnvd
CVE		CVE-2026-45409
5 Jun 202622:06
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Rows per page
OSOS VersionArchitecturePackagePackage VersionFilename
Red Hat Hardened Images20251124noarchpython3-jsonschema+format4.26.0-9.hum1python3-jsonschema+format-4.26.0-9.hum1.noarch.rpm

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13 Jul 2026 05:11Current
6.1Medium risk
Vulners AI Score6.1
CVSS 3.15.3
CVSS 46.9
EPSS0.00408
SSVC
CWE-770
idna librarylong inputsdenial of serviceencoding functionincomplete fixpython applicationsunix environment
1