AnyIO run_process/open_process ignores extra_groups and can retain parent supplementary groups

AnyIO 4.14.0 accepts the POSIX extragroups argument on anyio.runprocess and anyio.openprocess, but openprocess forwards the wrong variable to the backend: when extragroups is not None, it assigns kwargs"extragroups" = group instead of extragroups. As a result, callers cannot reliably clear or set...

GHSA-82R6-8W77-94W6 AnyIO: TLSStream IDNA 2003 host name encoding enables potential TLS certificate spoofing

Impact Services using internationalized non-ASCII domain names are potentially vulnerable to TLS connections made from AnyIO's connecttcp or directly via TLSStream.wrap where the connection has through other means been hijacked and redirected to a malicious server. The attacker would obtain a...

AnyIO: TLSStream IDNA 2003 host name encoding enables potential TLS certificate spoofing

Impact Services using internationalized non-ASCII domain names are potentially vulnerable to TLS connections made from AnyIO's connecttcp or directly via TLSStream.wrap where the connection has through other means been hijacked and redirected to a malicious server. The attacker would obtain a...

Allocation of Resources Without Limits or Throttling

Overview anyio is a High level compatibility layer for multiple asynchronous event loop implementations Affected versions of this package are vulnerable to Allocation of Resources Without Limits or Throttling in processworker within src/anyio/toprocess.py, where stderr in a worker subprocess is...

GHSA-5P39-CFHJ-2XMP AnyIO process-pool workers can block indefinitely on undrained stderr

Impact AnyIO starts process-pool workers with stderr connected to a pipe but never drains that pipe. The worker redirects stdin and stdout to /dev/null to protect its protocol, but does not redirect stderr even though the documentation says all three standard streams are redirected. Worker code...

AnyIO process-pool workers can block indefinitely on undrained stderr

Impact AnyIO starts process-pool workers with stderr connected to a pipe but never drains that pipe. The worker redirects stdin and stdout to /dev/null to protect its protocol, but does not redirect stderr even though the documentation says all three standard streams are redirected. Worker code...

DEBIAN-CVE-2026-63349

AnyIO is a high level asynchronous concurrency and networking framework that works on top of either Trio or asyncio. In 4.14.0, AnyIO accepts the POSIX extragroups argument in anyio.runprocess and anyio.openprocess, but openprocess forwards the group argument to the backend instead of extragroups...

CVE-2026-63349

AnyIO is a high level asynchronous concurrency and networking framework that works on top of either Trio or asyncio. In 4.14.0, AnyIO accepts the POSIX extragroups argument in anyio.runprocess and anyio.openprocess, but openprocess forwards the group argument to the backend instead of extragroups...

CVE-2026-63349

AnyIO is a high level asynchronous concurrency and networking framework that works on top of either Trio or asyncio. In 4.14.0, AnyIO accepts the POSIX extragroups argument in anyio.runprocess and anyio.openprocess, but openprocess forwards the group argument to the backend instead of extragroups...

EUVD-2026-83193

AnyIO is a high level asynchronous concurrency and networking framework that works on top of either Trio or asyncio. Prior to 4.14.2, AnyIO starts process-pool workers with standard error connected to a pipe that the parent never drains, even though the documented behavior redirects all three...

CVE-2026-64847

AnyIO is a high level asynchronous concurrency and networking framework that works on top of either Trio or asyncio. Prior to 4.14.2, AnyIO starts process-pool workers with standard error connected to a pipe that the parent never drains, even though the documented behavior redirects all three...

CVE-2026-64847 AnyIO process-pool workers can block indefinitely on undrained stderr

AnyIO is a high level asynchronous concurrency and networking framework that works on top of either Trio or asyncio. Prior to 4.14.2, AnyIO starts process-pool workers with standard error connected to a pipe that the parent never drains, even though the documented behavior redirects all three...

CVE-2026-64847 AnyIO process-pool workers can block indefinitely on undrained stderr

AnyIO is a high level asynchronous concurrency and networking framework that works on top of either Trio or asyncio. Prior to 4.14.2, AnyIO starts process-pool workers with standard error connected to a pipe that the parent never drains, even though the documented behavior redirects all three...

CVE-2026-64847

AnyIO is a high-level asynchronous concurrency framework. Prior to version 4.14.2 , process-pool workers are started with stderr connected to a pipe that the parent never drains , despite documentation stating all three standard streams are redirected. While stdin and stdout are redirected to /de...

CVE-2026-64847 AnyIO process-pool workers can block indefinitely on undrained stderr

AnyIO is a high level asynchronous concurrency and networking framework that works on top of either Trio or asyncio. Prior to 4.14.2, AnyIO starts process-pool workers with standard error connected to a pipe that the parent never drains, even though the documented behavior redirects all three...

EUVD-2026-83191

AnyIO is a high level asynchronous concurrency and networking framework that works on top of either Trio or asyncio. In 4.14.0, AnyIO accepts the POSIX extragroups argument in anyio.runprocess and anyio.openprocess, but openprocess forwards the group argument to the backend instead of extragroups...

CVE-2026-63349

AnyIO is a high level asynchronous concurrency and networking framework that works on top of either Trio or asyncio. In 4.14.0, AnyIO accepts the POSIX extragroups argument in anyio.runprocess and anyio.openprocess, but openprocess forwards the group argument to the backend instead of extragroups...

CVE-2026-63349

AnyIO 4.14.0, a high-level asynchronous concurrency framework for Python, contains a correctness bug in its POSIX subprocess helpers. When open_process() receives a non-None extra_groups argument, it incorrectly assigns the group variable instead of extra_groups to the backend's kwargs. As a resu...

CVE-2026-63349 AnyIO run_process/open_process ignores extra_groups and can retain parent supplementary groups

AnyIO is a high level asynchronous concurrency and networking framework that works on top of either Trio or asyncio. In 4.14.0, AnyIO accepts the POSIX extragroups argument in anyio.runprocess and anyio.openprocess, but openprocess forwards the group argument to the backend instead of extragroups...

CVE-2026-63349 AnyIO run_process/open_process ignores extra_groups and can retain parent supplementary groups

AnyIO is a high level asynchronous concurrency and networking framework that works on top of either Trio or asyncio. In 4.14.0, AnyIO accepts the POSIX extragroups argument in anyio.runprocess and anyio.openprocess, but openprocess forwards the group argument to the backend instead of extragroups...