CVE-2026-44432

HIGH

CVSS v3.1: 7.5 · EPSS: 0.0039 (30.7 percentile)

NetworkNo privilegesNo user interactionVendor advisory ref

Source data as of:

At a glance

Severity
HIGH
CVSS
7.5 v3.1 · NVD
EPSS
0.0039 (30.7 percentile) · FIRST.org
CISA KEV
No
Attack conditions (CVSS vector)
NetworkNo privilegesNo user interaction · Source: NVD Vector
Affected vendors
python
Published
2026-05-13 · Modified: 2026-06-30
References
Jump to references (8)

CVSS / EPSS / KEV

CVSS v3.1 7.5 / 10 HIGH Source: NVD
CVSS v4.0 8.9 / 10 HIGH Source: NVD
EPSS 0.0039 30.7 percentile Source: FIRST.org
CISA KEV No Source: CISA

Source — CVSS: NVD · EPSS: FIRST.org · KEV: CISA. Data & Sources

Description

urllib3 is an HTTP client library for Python. From 2.6.0 to before 2.7.0, urllib3 could decompress the whole response instead of the requested portion (1) during the second HTTPResponse.read(amt=N) call when the response was decompressed using the official Brotli library or (2) when HTTPResponse.drain_conn() was called after the response had been read and decompressed partially (compression algorithm did not matter here). These issues could cause urllib3 to fully decode a small amount of highly compressed data in a single operation. This could result in excessive resource consumption (high CPU usage and massive memory allocation for the decompressed data) on the client side. This vulnerability is fixed in 2.7.0.

Record details

CVE ID
CVE-2026-44432
CVSS (v3.1)
7.5 (HIGH)
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Exploitability subscore
3.9
Impact subscore
3.6
EPSS
0.0039 (30.7 percentile) — 2026-06-30
CISA KEV
No
Weakness (CWE)
CWE-409
Affected vendors
python
Affected configurations (CPE)
1
Published
2026-05-13
Modified
2026-06-30
Status
Modified

References

Reference URLs as listed by NVD, grouped by a mechanical match on the link's host/pattern. Labels describe the link type only.

Related records

Other records sharing a factual facet, for cross-reference. A descriptive neighbourhood — ordering does not imply priority and is not a recommendation.

Same affected vendor

CVE-2026-21441 HIGH CVSS 7.5 CVE-2026-25990 HIGH CVSS 7.5 CVE-2026-32274 HIGH CVSS 7.5 CVE-2026-40192 HIGH CVSS 7.5

Same weakness type (CWE)

CVE-2025-69223 HIGH CVSS 7.5 CVE-2026-1526 HIGH CVSS 7.5 CVE-2026-21441 HIGH CVSS 7.5 CVE-2026-29785 HIGH CVSS 7.5

Published the same year

CVE-2026-0881 CRITICAL CVSS 10.0 CVE-2026-2760 CRITICAL CVSS 10.0 CVE-2026-2761 CRITICAL CVSS 10.0 CVE-2026-2768 CRITICAL CVSS 10.0
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