High 7.5Published Jul 8, 2026

CVE-2026-59939httplib2: Decompression Bomb Denial of Service via Unbounded gzip/deflate Response Handling

Updated under an hour ago (Oct 27, 2026, 1:20 PM ET)

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It affects httplib2 and 1 other product. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for httplib2

Exploited in the last 30 days

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.

CVSS: 7.5 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness (CWE): CWE-409
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: GitHub_M
NVD analysis: Modified
Record last updated: Aug 20, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

httplib2 httplib2 httplib2:httplib2 (from the name)	before 0.32.0	CNA record
httplib2_project httplib2 httplib2_project:httplib2	before 0.32.0	NVD

References

References

https://github.com/httplib2/httplib2/security/advisories/GHSA-j5g9-f88f-gfj3	x-refsource-confirm, exploit, vendor-advisory
https://github.com/httplib2/httplib2/commit/87581ad6cf752fe3da2090c59058261d2d00a427	x-refsource-misc, patch
https://github.com/httplib2/httplib2/releases/tag/v0.32.0	x-refsource-misc, release-notes
https://lists.debian.org/debian-lts-announce/2026/08/msg00039.html

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.