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CVE record · CVE-2021-23336

Web Cache Poisoning

CVSS 5.9 MediumEPSS 0.41 · 98th percentile

Published by the CVE Program (CNA: snyk) at 15 Feb 2021, 12:15 UTC. agentprime has not analysed this yet, so whether it affects any app is not known. This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it.

Affected products, as the CNA wrote them
VendorProductVersions
Not given python/cpython
  • affected before unspecified custom
  • affected unspecified to before 3.6.13 custom
  • affected 3.7.0 to before unspecified custom
  • affected unspecified to before 3.7.10 custom
  • affected 3.8.0 to before unspecified custom
  • affected unspecified to before 3.8.8 custom
  • affected 3.9.0 to before unspecified custom
  • affected unspecified to before 3.9.2 custom
Identifiers
CVE-2021-23336
CNA
snyk
Weakness (CWE)
CWE-444
Tags
Published
15 Feb 2021
Updated
14 Oct 2026

Not analysed yet

We haven’t published our own analysis of this CVE. If a person reviews it, this page will say what’s affected and what has to be true for it to matter.

Severity and exploitation

ScoreRatingCVSSVectorSource
5.9 Medium 3.1 CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:H/E:P/RL:U/RC:C CNA (snyk)
  • CISA KEV Not listed.
  • EPSS 0.41, the 98th percentile, on 7 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

This record came from the full history of the CVE Program, published 15 Feb 2021. New records show when each source confirmed them.

Sources

References from the CNA

And 7 more on the CVE record.

Facts on this page come from the CVE List as the CNA published them, with CVSS from the sources named above, CISA KEV and FIRST EPSS. Vendors, products and versions are shown as the CNA wrote them. We don’t reproduce the CVE’s description.