CVE-2026-1527

Undici (Node.js HTTP client) is vulnerable to a CRLF injection via the upgrade option in client.request() when user-controlled input is passed to the upgrade value. The root cause is that the upgrade value is written directly to the socket without validating header characters, allowing an attacke...

CVE-2026-1527

ImpactWhen an application passes user-controlled input to the upgrade option of client.request, an attacker can inject CRLF sequences \r\n to: Inject arbitrary HTTP headers Terminate the HTTP request prematurely and smuggle raw data to non-HTTP services Redis, Memcached, Elasticsearch The...

CVE-2026-1527 undici is vulnerable to CRLF Injection via upgrade option

ImpactWhen an application passes user-controlled input to the upgrade option of client.request, an attacker can inject CRLF sequences \r\n to: Inject arbitrary HTTP headers Terminate the HTTP request prematurely and smuggle raw data to non-HTTP services Redis, Memcached, Elasticsearch The...

CVE-2026-1527

ImpactWhen an application passes user-controlled input to the upgrade option of client.request, an attacker can inject CRLF sequences \r\n to: Inject arbitrary HTTP headers Terminate the HTTP request prematurely and smuggle raw data to non-HTTP services Redis, Memcached, Elasticsearch The...

RLSA-2026:4463 Moderate: python3.12 security update

Python is an interpreted, interactive, object-oriented programming language, which includes modules, classes, exceptions, very high level dynamic data types and dynamic typing. Python supports interfaces to many system calls and libraries, as well as to various windowing systems. Security Fixes:...

python3.12 security update

An update is available for python3.12. This update affects Rocky Linux 8. A Common Vulnerability Scoring System CVSS base score, which gives a detailed severity rating, is available for each vulnerability from the CVE list Python is an interpreted, interactive, object-oriented programming languag...

Moderate: Red Hat Security Advisory: python3.11 security update

An update for python3.11 is now available for Red Hat Enterprise Linux 8. Red Hat Product Security has rated this update as having a security impact of Moderate. A Common Vulnerability Scoring System CVSS base score, which gives a detailed severity rating, is available for each vulnerability from...

cpython: wsgiref.headers.Headers allows header newline injection in Python

Missing newline filtering has been discovered in Python. User-controlled header names and values containing newlines can allow injecting HTTP headers...

cpython: email header injection due to unquoted newlines

A flaw was found in the email module in the Python standard library. When serializing an email message, the BytesGenerator class fails to properly quote newline characters for email headers. This issue is exploitable when the LiteralHeader class is used as it does not respect email folding rules,...

cpython: wsgiref.headers.Headers allows header newline injection in Python

Missing newline filtering has been discovered in Python. User-controlled header names and values containing newlines can allow injecting HTTP headers...

Moderate: Red Hat Security Advisory: python3.12 security update

An update for python3.12 is now available for Red Hat Enterprise Linux 8. Red Hat Product Security has rated this update as having a security impact of Moderate. A Common Vulnerability Scoring System CVSS base score, which gives a detailed severity rating, is available for each vulnerability from...

cpython: email header injection due to unquoted newlines

A flaw was found in the email module in the Python standard library. When serializing an email message, the BytesGenerator class fails to properly quote newline characters for email headers. This issue is exploitable when the LiteralHeader class is used as it does not respect email folding rules,...

RLSA-2026:4216 Moderate: python3.11 security update

Python is an interpreted, interactive, object-oriented programming language, which includes modules, classes, exceptions, very high level dynamic data types and dynamic typing. Python supports interfaces to many system calls and libraries, as well as to various windowing systems. Security Fixes:...

python3.11 security update

An update is available for python3.11. This update affects Rocky Linux 9. A Common Vulnerability Scoring System CVSS base score, which gives a detailed severity rating, is available for each vulnerability from the CVE list Python is an interpreted, interactive, object-oriented programming languag...

Security update for python36

This update for python36 fixes the following issues: CVE-2026-1299: header injection when an email is serialized due to improper newline quoting in BytesGenerator bsc1257181. Patch Instructions: To install this SUSE update use the SUSE recommended installation methods like YaST onlineupdate or...

SUSE-SU-2026:0884-1 Security update for python36

This update for python36 fixes the following issues: - CVE-2026-1299: header injection when an email is serialized due to improper newline quoting in BytesGenerator bsc1257181...

RockyLinux 8 : python3.12 (RLSA-2026:4463)

The remote RockyLinux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the RLSA-2026:4463 advisory. cpython: wsgiref.headers.Headers allows header newline injection in Python CVE-2026-0865 cpython: IMAP command injection in user-controlled commands...

MiracleLinux 9 : python3.12-3.12.12-4.el9_7.1 (AXSA:2026-294:08)

The remote MiracleLinux 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the AXSA:2026-294:08 advisory. cpython: IMAP command injection in user-controlled commands CVE-2025-15366 cpython: POP3 command injection in user-controlled commands CVE-2025-15367...

MiracleLinux 9 : python3.11-3.11.13-5.1.el9_7 (AXSA:2026-297:05)

The remote MiracleLinux 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the AXSA:2026-297:05 advisory. cpython: IMAP command injection in user-controlled commands CVE-2025-15366 cpython: POP3 command injection in user-controlled commands CVE-2025-15367...

ALSA-2026:4463 Moderate: python3.12 security update

Python is an interpreted, interactive, object-oriented programming language, which includes modules, classes, exceptions, very high level dynamic data types and dynamic typing. Python supports interfaces to many system calls and libraries, as well as to various windowing systems. Security Fixes:...