Recent security updates address critical vulnerabilities within the python-tornado framework and the OpenSSL toolkit used across Debian distributions. Tornado users must update to mitigate denial of service risks via multipart body limits while also resolving cookie injection flaws found in CVE-2026-35536. Meanwhile, the OpenSSL advisory warns that unpatched installations face severe risks ranging from information leaks to potential remote code execution exploits. Immediate upgrades are necessary for stable and oldstable releases to close these security gaps effectively.

ELA-1672-1 python-tornado security update
[DSA 6201-1] openssl security update

ELA-1672-1 python-tornado security update

Package : python-tornado
Version : 4.4.3-1+deb9u3 (stretch), 5.1.1-4+deb10u4 (buster)

Related CVEs :
CVE-2026-31958
CVE-2026-35536

Multiple vulnerabilities were discovered in python-tornado, a scalable,
non-blocking Python web framework and asynchronous networking library.

CVE-2026-31958
Introduce new limits on the size and complexity of multipart bodies,
including a default limit of 100 parts per request to mitigate a possible
DoS. It is also possible to disable parsing multipart/form-data entirely
if not required

CVE-2026-35536
Values passed to the domain, path, and samesite arguments of
RequestHandler.set_cookie are not completely validated. In particular,
semicolons are allowed, which could be used to inject attacker-controlled
values for other cookie attributes.

ELA-1672-1 python-tornado security update

[SECURITY] [DSA 6201-1] openssl security update

- -------------------------------------------------------------------------
Debian Security Advisory DSA-6201-1 security@debian.org
https://www.debian.org/security/ Salvatore Bonaccorso
April 07, 2026 https://www.debian.org/security/faq
- -------------------------------------------------------------------------

Package : openssl
CVE ID : CVE-2026-2673 CVE-2026-28387 CVE-2026-28388 CVE-2026-28389
CVE-2026-28390 CVE-2026-31789 CVE-2026-31790
Debian Bug : 1130650

Multiple vulnerabilities have been discovered in OpenSSL, a Secure
Sockets Layer toolkit, which may result in denial of service,
information leaks, or potentially remote code execution.

Additional details can be found in the upstream advisory:
https://openssl-library.org/news/secadv/20260407.txt

For the oldstable distribution (bookworm), these problems have been fixed
in version 3.0.19-1~deb12u2.

For the stable distribution (trixie), these problems have been fixed in
version 3.5.5-1~deb13u2.

We recommend that you upgrade your openssl packages.

For the detailed security status of openssl please refer to its security
tracker page at:
https://security-tracker.debian.org/tracker/openssl

Further information about Debian Security Advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://www.debian.org/security/