https://cve.radiocsirt.org/rss/recent/all/10 Most recent entries from all 2026-10-03T07:34:06.204524+00:00 Vulnerability-Lookup csirt@opendfir.org python-feedgen Contains only the most 10 recent entries. https://cve.radiocsirt.org/vuln/alsa-2021:4160 ALSA-2021:4160 — Moderate: python39:3.9 and python39-devel:3.9 security update 2026-10-03T07:34:08.084190+00:00

Affected: AlmaLinux:8: python39-Cython, AlmaLinux:8: python39-PyMySQL, AlmaLinux:8: python39-attrs, AlmaLinux:8: python39-cffi, AlmaLinux:8: python39-chardet, AlmaLinux:8: python39-cryptography, AlmaLinux:8: python39-idna, AlmaLinux:8: python39-iniconfig, AlmaLinux:8: python39-mod_wsgi, AlmaLinux:8: python39-more-itertools and 26 more

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 Fix(es):

* python: Information disclosure via pydoc (CVE-2021-3426)

* python: urllib: Regular expression DoS in AbstractBasicAuthHandler (CVE-2021-3733)

* python-lxml: Missing input sanitization for formaction HTML5 attributes may lead to XSS (CVE-2021-28957)

* python-ipaddress: Improper input validation of octal strings (CVE-2021-29921)

* python-urllib3: ReDoS in the parsing of authority part of URL (CVE-2021-33503)

* python-pip: Incorrect handling of unicode separators in git references (CVE-2021-3572)

* python: urllib: HTTP client possible infinite loop on a 100 Continue response (CVE-2021-3737)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Additional Changes:

For detailed information on changes in this release, see the AlmaLinux Release Notes linked from the References section.

 https://cve.radiocsirt.org/vuln/bdu:2022-00586 bdu:2022-00586 2026-10-03T07:34:08.084313+00:00 bdu:2022-00586 https://cve.radiocsirt.org/vuln/brew-airshare-cve-2021-33503 BREW-airshare-CVE-2021-33503 — Catastrophic backtracking in URL authority parser when passed URL containing many @ characters 2026-10-03T07:34:08.084331+00:00

Affected: Homebrew: airshare

### Impact

When provided with a URL containing many `@` characters in the authority component the authority regular expression exhibits catastrophic backtracking causing a denial of service if a URL were passed as a parameter or redirected to via an HTTP redirect.

### Patches

The issue has been fixed in urllib3 v1.26.5.

### References

- [CVE-2021-33503](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-33503) - [JVNVU#92413403 (English)](https://jvn.jp/en/vu/JVNVU92413403/) - [JVNVU#92413403 (Japanese)](https://jvn.jp/vu/JVNVU92413403/) - [urllib3 v1.26.5](https://github.com/urllib3/urllib3/releases/tag/1.26.5)

### For more information If you have any questions or comments about this advisory: * Ask in our [community Discord](https://discord.gg/urllib3) * Email [sethmichaellarson@gmail.com](mailto:sethmichaellarson@gmail.com)

 https://cve.radiocsirt.org/vuln/certfr-2021-avi-490 certfr-2021-avi-490 — De multiples vulnérabilités ont été découvertes dans IBM Spectrum Protect. Certaines d'entre elles permettent à un atta… 2026-10-03T07:34:08.084363+00:00 certfr-2021-avi-490 https://cve.radiocsirt.org/vuln/euvd-2026-28431 EUVD-2026-28431 2026-10-03T07:34:08.084380+00:00 EUVD-2026-28431 https://cve.radiocsirt.org/vuln/fkie_cve-2021-33503 fkie_cve-2021-33503 2026-10-03T07:34:08.084392+00:00

An issue was discovered in urllib3 before 1.26.5. When provided with a URL containing many @ characters in the authority component, the authority regular expression exhibits catastrophic backtracking, causing a denial of service if a URL were passed as a parameter or redirected to via an HTTP redirect.

 https://cve.radiocsirt.org/vuln/ghsa-q2q7-5pp4-w6pg GHSA-q2q7-5pp4-w6pg — Catastrophic backtracking in URL authority parser when passed URL containing many @ characters 2026-10-03T07:34:08.084414+00:00

Affected: PyPI: urllib3

### Impact

When provided with a URL containing many `@` characters in the authority component the authority regular expression exhibits catastrophic backtracking causing a denial of service if a URL were passed as a parameter or redirected to via an HTTP redirect.

### Patches

The issue has been fixed in urllib3 v1.26.5.

### References

- [CVE-2021-33503](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-33503) - [JVNVU#92413403 (English)](https://jvn.jp/en/vu/JVNVU92413403/) - [JVNVU#92413403 (Japanese)](https://jvn.jp/vu/JVNVU92413403/) - [urllib3 v1.26.5](https://github.com/urllib3/urllib3/releases/tag/1.26.5)

### For more information If you have any questions or comments about this advisory: * Ask in our [community Discord](https://discord.gg/urllib3) * Email [sethmichaellarson@gmail.com](mailto:sethmichaellarson@gmail.com)

 https://cve.radiocsirt.org/vuln/gsd-2021-33503 gsd-2021-33503 2026-10-03T07:34:08.084441+00:00 gsd-2021-33503 https://cve.radiocsirt.org/vuln/jvndb-2021-001756 jvndb-2021-001756 2026-10-03T07:34:08.084452+00:00

urllib3 contains a Regular expression Denial-of-Service (DoS) vulnerability. urllib3, an HTTP client module for Python, contains a Regular expression Denial-of-Service (ReDoS) vulnerability (CWE-400, CVE-2021-33503) due to catastrophic backtracking while processing a malicious URL. Nariyoshi Chida of NTT Secure Platform Laboratories reported this vulnerability to urllib3 community and coordinated. JPCERT/CC published this advisory in order to notify users of this vulnerability.

 https://cve.radiocsirt.org/vuln/msrc_cve-2021-33503 msrc_CVE-2021-33503 — An issue was discovered in urllib3 before 1.26.5. When provided with a URL containing many @ characters in the authorit… 2026-10-03T07:34:08.084471+00:00 msrc_CVE-2021-33503 https://cve.radiocsirt.org/vuln/oesa-2021-1260 OESA-2021-1260 — python-urllib3 security update 2026-10-03T07:34:08.084489+00:00

Affected: openEuler:20.03-LTS-SP1: python-urllib3

Security Fix(es): An issue was discovered in urllib3 before 1.26.5. When provided with a URL containing many @ characters in the authority component, the authority regular expression exhibits catastrophic backtracking, causing a denial of service if a URL were passed as a parameter or redirected to via an HTTP redirect.(CVE-2021-33503)

 https://cve.radiocsirt.org/vuln/opensuse-su-2021:2012-1 openSUSE-SU-2021:2012-1 — Security update for python-urllib3 2026-10-03T07:34:08.084510+00:00

Security update for python-urllib3

 https://cve.radiocsirt.org/vuln/pysec-2021-108 PYSEC-2021-108 2026-10-03T07:34:08.084525+00:00

Affected: PyPI: urllib3

An issue was discovered in urllib3 before 1.26.5. When provided with a URL containing many @ characters in the authority component, the authority regular expression exhibits catastrophic backtracking, causing a denial of service if a URL were passed as a parameter or redirected to via an HTTP redirect.

 https://cve.radiocsirt.org/vuln/rhsa-2021:3254 RHSA-2021:3254 — Red Hat Security Advisory: rh-python38 security, bug fix, and enhancement update 2026-10-03T07:34:08.084543+00:00

python-cryptography: Bleichenbacher timing oracle attack against RSA decryption python: Unsafe use of eval() on data retrieved via HTTP in the test suite python-lxml: mXSS due to the use of improper parser python-jinja2: ReDoS vulnerability in the urlize filter python-cryptography: Large inputs for symmetric encryption can trigger integer overflow leading to buffer overflow python: Stack-based buffer overflow in PyCArg_repr in _ctypes/callproc.c python: Information disclosure via pydoc python-pip: Incorrect handling of unicode separators in git references python: urllib: Regular expression DoS in AbstractBasicAuthHandler python: ftplib should not use the host from the PASV response python-babel: Relative path traversal allows attacker to load arbitrary locale files and execute arbitrary code python: Web cache poisoning via urllib.parse.parse_qsl and urllib.parse.parse_qs by using a semicolon in query parameters python-lxml: Missing input sanitization for formaction HTML5 attributes may lead to XSS python-ipaddress: Improper input validation of octal strings python-urllib3: ReDoS in the parsing of authority part of URL python-babel: Relative path traversal allows attacker to load arbitrary locale files and execute arbitrary code python: urllib.parse does not sanitize URLs containing ASCII newline and tabs

 https://cve.radiocsirt.org/vuln/suse-su-2021:2012-1 SUSE-SU-2021:2012-1 — Security update for python-urllib3 2026-10-03T07:34:08.084590+00:00

Security update for python-urllib3

 https://cve.radiocsirt.org/vuln/ubuntu-cve-2021-33503 UBUNTU-CVE-2021-33503 2026-10-03T07:34:08.084606+00:00

Affected: Ubuntu:20.04:LTS: python-pip, Ubuntu:20.04:LTS: python-urllib3

An issue was discovered in urllib3 before 1.26.5. When provided with a URL containing many @ characters in the authority component, the authority regular expression exhibits catastrophic backtracking, causing a denial of service if a URL were passed as a parameter or redirected to via an HTTP redirect.

 https://cve.radiocsirt.org/vuln/wid-sec-w-2023-0156 WID-SEC-W-2023-0156 — Red Hat OpenShift: Schwachstelle ermöglicht Denial of Service 2026-10-03T07:34:08.084625+00:00

Ein entfernter, anonymer Angreifer kann eine Schwachstelle in Red Hat OpenShift ausnutzen, um einen Denial of Service Angriff durchzuführen.