HTTP Request Smuggling in Waitress: Invalid whitespace characters in headers (Follow-up)

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

• CISA KEV Not listed.
• EPSS 0.026, the 85th percentile, on 8 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 GitHub Advisory Database, published 6 Jan 2020. New records show when each source confirmed them.

Sources

• GitHub Advisory Database: GHSA-968f-66r5-5v74
• OSV: GHSA-968f-66r5-5v74
• github.com/Pylons/waitress/security/advisories/GHSA-968f-66r5-5v74
• nvd.nist.gov/vuln/detail/CVE-2019-16789
• github.com/github/advisory-review/pull/14604
• github.com/Pylons/waitress/commit/11d9e138125ad46e951027184b13242a3c1de017
• github.com/Pylons/waitress/commit/ddb65b489d01d696afa1695b75fdd5df3e4ffdf8
• access.redhat.com/errata/RHSA-2020:0720
• docs.pylonsproject.org/projects/waitress/en/latest/#security-fixes
• github.com/Pylons/waitress
• github.com/advisories/GHSA-968f-66r5-5v74
• github.com/pypa/advisory-database/tree/main/vulns/waitress/PYSEC-2019-138.yaml
• lists.debian.org/debian-lts-announce/2022/05/msg00011.html
• lists.fedoraproject.org/archives/list/[email protected]/message/GVDHR2DNKCNQ7YQXISJ45NT4IQDX3LJ7

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.