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

MITRE NVD CVE.ORG JSON API Print: PDF PDF

Summary

CVECVE-2026-59939
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-07-08 20:16:59 UTC
Updated2026-07-08 20:16:59 UTC
Descriptionhttplib2 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.

Risk And Classification

Primary CVSS: v3.1 7.5 HIGH from [email protected]

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Problem Types: CWE-409 | CWE-409 CWE-409: Improper Handling of Highly Compressed Data (Data Amplification)

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary7.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
3.1CNADECLARED7.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Httplib2 Httplib2 affected < 0.32.0 Not specified

References

ReferenceSourceLinkTags
github.com/httplib2/httplib2/security/advisories/GHSA-j5g9-f88f-gfj3 [email protected] github.com
github.com/httplib2/httplib2/releases/tag/v0.32.0 [email protected] github.com
github.com/httplib2/httplib2/commit/87581ad6cf752fe3da2090c59058261d2d00... [email protected] github.com
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