CVE-2026-59939
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…
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.42%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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.
- CVSS 3.1
- 7.5 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 0.42% probability · 36th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-409
- Affected
- httplib2 project/httplib2
- Source
- security-advisories@github.com
References
- https://github.com/httplib2/httplib2/commit/87581ad6cf752fe3da2090c59058261d2d00a427Patch
- https://github.com/httplib2/httplib2/releases/tag/v0.32.0Release Notes
- https://github.com/httplib2/httplib2/security/advisories/GHSA-j5g9-f88f-gfj3Exploit, Vendor Advisory
- https://lists.debian.org/debian-lts-announce/2026/08/msg00039.html
- https://github.com/httplib2/httplib2/security/advisories/GHSA-j5g9-f88f-gfj3Exploit, Vendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.