CVE-2026-59939 — Security Box Score

CVE · referencelatest edition

Reference page — cumulative record through Wednesday, August 19, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.

CVE-2026-59939HIGH

httplib2: Decompression Bomb Denial of Service via Unbounded gzip/deflate Response Handling

  AV  AC  PR  UI  S  C  I  A   CVSS    EPSS   %ile   KEV
   N   L   N   N  U  N  N  H    7.5   .0041   34.3     —

AFFECTED
  Product   Versions    Fixed
  httplib2  < 0.32.0 –  —

TIMELINE
  Jul 7   Reserved by GitHub_M
  Jul 8   EXPLOIT PUBLISHED — CVE-2026-59939 (httplib2). Public exploit reference added.
  Jul 8   Published (CNA: GitHub_M)

CWE-409 · CNA: GitHub_M · CVSS v3.1 · 3 references · NVD status: Analyzed

Description

httplib2 is a comprehensive HTTP client library for Python. Prior to 0.32.0, httplib2 performs unbounded decompression of HTTP response bodies encoded with Content-Encoding: gzip or deflate in _decompressContent in httplib2/init.py, allowing a malicious or compromised HTTP server to return a small compressed payload that expands to an arbitrarily large size in memory and causes MemoryError or OOM-kill in the client process. This issue is fixed in version 0.32.0.

Lifecycle

Complete event history — 3 events, chronological
Date	Event	Detail
July 7, 2026	Reserved	Reserved by GitHub_M
July 8, 2026	EXPLOIT PUBLISHED	EXPLOIT PUBLISHED — CVE-2026-59939 (httplib2). Public exploit reference added.
July 8, 2026	Published	Published (CNA: GitHub_M)

Affected

Affected products and packages — 1 row
Vendor	Product / Package	Ecosystem	Version introduced	Fixed
httplib2	httplib2	—	< 0.32.0	—

Weaknesses

CWE-409

References (3)

https://github.com/httplib2/httplib2/commit/87581ad6cf752fe3da2090c59058261d2d00a427 [Patch]
https://github.com/httplib2/httplib2/releases/tag/v0.32.0 [Release Notes]
https://github.com/httplib2/httplib2/security/advisories/GHSA-j5g9-f88f-gfj3 [Exploit, Vendor Advisory]

Authoritative record: CVE-2026-59939 at cve.org

Vendors: httplib2

Weaknesses: CWE-409

About this page

This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2026-59939 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Wednesday, August 19, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.