CVE-2020-11078

CVE-2020-11078 affects httplib2 prior to 0.18.0. An attacker controlling an unescaped portion of the URI in httplib2.Http.request() could alter request headers and body and send hidden requests to the same server. The issue occurs when URIs are built by string concatenation rather than proper esc...

CVE-2021-21240

CVE-2021-21240 affects httplib2 prior to 0.19.0. A malicious server can send a WWW-Authenticate header containing a long sequence of non-breaking spaces (\xa0), causing a Denial of Service by CPU-intensive header parsing. The root cause is in how httplib2 parses auth headers; a fix was implemente...

CVE-2026-59939

The CVE-2026-59939 affects the Python httplib2 library prior to 0.32.0. The root cause is unbounded decompression of HTTP response bodies encoded with gzip or deflate in _decompressContent, allowing a malicious server to send a small compressed payload that expands to very large in-memory size, l...