StackPrism

PyPI package

idna vulnerabilities by version

The latest release, 3.20, has no known vulnerabilities. 4 of the 10 most recent releases have known vulnerabilities. OSV.dev lists 2 advisories for idna; the newest was published on May 19, 2026.

PyPI (opens in a new tab) describes it as “Internationalized Domain Names in Applications (IDNA)”

Latest release
3.20
no known vulnerabilities
Downloads last week
354.4M
All versions, from pypistats.org
Advisories on OSV.dev
2
Newest May 19, 2026
Licence
BSD-3-Clause
OpenSSF Scorecard
8.5/10
kjd/idna (opens in a new tab)

Recent releases

PyPI doesn’t publish downloads per version, so these are the newest releases, each checked against OSV.dev. Open a version for its advisories and what to upgrade to.

VersionKnown vulnerabilities
3.20.0Sep 17, 2026No known vulnerabilities
3.19.0Aug 18, 2026No known vulnerabilities
3.18.0Jun 2, 2026No known vulnerabilities
3.17.0May 28, 2026No known vulnerabilities
3.16.0May 22, 2026No known vulnerabilities
3.15.0May 12, 2026No known vulnerabilities
3.14.0May 10, 20261 known vulnerability, worst rated warning
3.13.0Apr 22, 20261 known vulnerability, worst rated warning
3.12.0Apr 21, 20261 known vulnerability, worst rated warning
3.11.0Oct 12, 20251 known vulnerability, worst rated warning

Release lines

The newest release of each minor line, from the registry. idna doesn’t publish support dates we can check.

LineNewest releaseReleased
3.203.20.0Sep 17, 2026
3.193.19.0Aug 18, 2026
3.183.18.0Jun 2, 2026
3.173.17.0May 28, 2026
3.163.16.0May 22, 2026
3.153.15.0May 12, 2026

Newest advisories

The 2 most recently published, with the versions each one affects.

  1. WarningCVE-2026-45409 on OSV.dev (opens in a new tab)GHSA-65pc-fj4g-8rjx

    Internationalized Domain Names in Applications (IDNA): Specially crafted inputs to idna.encode() can bypass CVE-2024-3651 fix

    Affects < 3.15. Published May 19, 2026.

  2. WarningCVE-2024-3651 on OSV.dev (opens in a new tab)GHSA-jjg7-2v4v-x38h

    Internationalized Domain Names in Applications (IDNA) vulnerable to denial of service from specially crafted inputs to idna.encode

    Affects < 3.7. Published Apr 11, 2024.

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How this page is checked

StackPrism reads every OSV.dev advisory for idna, merges duplicates filed under several ids, and asks OSV.dev which ones affect each version listed. Releases and their dates come from deps.dev, downloads from pypistats.org. No AI writes this page: every sentence comes from that data, refreshed every few hours.

Last checked against OSV.dev, CISA KEV, PyPI, pypistats.org and deps.dev.