How many CVEs have patched parse_qs_bytes?

1 published CVEs changed parse_qs_bytes in tornadoweb/tornado, in 2 distinct patches totalling 16 changed lines, between 2026 and 2026.

What is the latest CVE that changed parse_qs_bytes?

CVE-2026-82397 (Tornado: Urlencoded body parsing omits max_num_fields, so one request can stall the event loop), published 2026-08-31, changed lines 174 to 200 of tornado/escape.py.

How does parse_qs_bytes compare to the rest of tornadoweb/tornado?

tornadoweb/tornado has 16 CVEs with a located fix in total; 1 of them changed parse_qs_bytes.

What do the line numbers refer to?

Line numbers are in the fixed version of the file, as the upstream patch left it. A CVE whose fix was backported to several branches is listed once, with the lines from the upstream commit.

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Security data

Weaknesses (CWE)The MITRE CWE weakness catalog
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Patched Functions
Tornadoweb
Tornado
Parse_qs_bytes

parse_qs_bytes in tornadoweb/tornado: Patched by 1 CVEs

tornadoweb/tornado

Function

parse_qs_bytes

Name: parse_qs_bytes in tornadoweb/tornado: CVE fixes
Creator: RadicalNotion.AI
License: https://creativecommons.org/licenses/by-nc/4.0/

tornado/escape.py

Last patched August 31, 2026

CVEs

That changed this function

Distinct patches

Backports counted once

Lines changed

Added plus removed

2026

Years

By CVE publication date

Overview

parse_qs_bytes in tornadoweb/tornado was changed by 1 published CVE fixes in 2026, in 2 distinct patches that added or removed 16 lines in total.

tornadoweb/tornado has 16 CVEs with a located fix in total, so 6% of them touched this function.

CVEs that patched it

Every published CVE whose fix changed parse_qs_bytes, newest first, with the lines each fix touched.

Tornado: Urlencoded body parsing omits max_num_fields, so one request can stall the event loop
CVE-2026-82397 · lines 174–200 · +14 −2
High · CVSS 7.5
EPSS 0.3%2026-08-31

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Other hotspots in the repository

Functions in tornadoweb/tornado changed by the most CVE fixes.

_websocket_mask_python4 CVEs · tornado/util.py parse_body_arguments3 CVEs · tornado/httputil.py parse_multipart_form_data3 CVEs · tornado/httputil.py close3 CVEs · tornado/curl_httpclient.py initialize3 CVEs · tornado/curl_httpclient.py ioctl3 CVEs · tornado/curl_httpclient.py

All patched functions in tornadoweb/tornado

Frequently asked questions

Common questions about CVE fixes to parse_qs_bytes.

How many CVEs have patched parse_qs_bytes?: 1 published CVEs changed parse_qs_bytes in tornadoweb/tornado, in 2 distinct patches totalling 16 changed lines, between 2026 and 2026.
What is the latest CVE that changed parse_qs_bytes?: CVE-2026-82397 (Tornado: Urlencoded body parsing omits max_num_fields, so one request can stall the event loop), published 2026-08-31, changed lines 174 to 200 of tornado/escape.py.
How does parse_qs_bytes compare to the rest of tornadoweb/tornado?: tornadoweb/tornado has 16 CVEs with a located fix in total; 1 of them changed parse_qs_bytes.
What do the line numbers refer to?: Line numbers are in the fixed version of the file, as the upstream patch left it. A CVE whose fix was backported to several branches is listed once, with the lines from the upstream commit.

References

tornado/escape.py on GitHub (opens in a new tab)
All patched functions in tornadoweb/tornado
Patched functions directory

Fix locations are computed by RadicalNotion.AI from the upstream patch diff of each CVE. CVE data is sourced from the CVE Program.

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Overview
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References