BIT-VIRTUALENV-2026-102938 virtualenv writes prompt values into pyvenv.cfg without sanitizing line boundaries, allowing configuration injection

virtualenv is a tool for creating isolated virtual python environments. Prior to 21.7.11, PyEnvCfg.write writes prompt values verbatim to the line-oriented pyvenv.cfg format while PyEnvCfg.readvalues parses the file with str.splitlines and accepts the last value for duplicate keys. An attacker wh...

CVE-2026-102938 virtualenv writes prompt values into pyvenv.cfg without sanitizing line boundaries, allowing configuration injection

virtualenv is a tool for creating isolated virtual python environments. Prior to 21.7.11, PyEnvCfg.write writes prompt values verbatim to the line-oriented pyvenv.cfg format while PyEnvCfg.readvalues parses the file with str.splitlines and accepts the last value for duplicate keys. An attacker wh...

CVE-2026-102938

virtualenv is a tool for creating isolated virtual python environments. Prior to 21.7.11, PyEnvCfg.write writes prompt values verbatim to the line-oriented pyvenv.cfg format while PyEnvCfg.readvalues parses the file with str.splitlines and accepts the last value for duplicate keys. An attacker wh...

PT-2026-102926

Name of the Vulnerable Software and Affected Versions virtualenv versions prior to 21.7.11 Description The PyEnvCfg.write function writes prompt values verbatim to the line-oriented pyvenv.cfg format, while PyEnvCfg. read values parses the file using str.splitlines and accepts the last value for...