https://cve.radiocsirt.org/rss/recent/all/10 Most recent entries from all 2026-10-12T18:16:55.894163+00:00 Vulnerability-Lookup csirt@opendfir.org python-feedgen Contains only the most 10 recent entries. https://cve.radiocsirt.org/vuln/alsa-2021:0618 ALSA-2021:0618 — Important: stunnel security update 2026-10-12T18:16:55.902787+00:00

Affected: AlmaLinux:8: stunnel

Stunnel is a wrapper for network connections. It can be used to tunnel an unencrypted network connection over an encrypted connection (encrypted using SSL or TLS) or to provide an encrypted means of connecting to services that do not natively support encryption.

Security Fix(es):

* stunnel: client certificate not correctly verified when redirect and verifyChain options are used (CVE-2021-20230)

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.

 https://cve.radiocsirt.org/vuln/bdu:2025-09865 bdu:2025-09865 2026-10-12T18:16:55.902834+00:00 bdu:2025-09865 https://cve.radiocsirt.org/vuln/euvd-2026-21533 EUVD-2026-21533 2026-10-12T18:16:55.902849+00:00 EUVD-2026-21533 https://cve.radiocsirt.org/vuln/fkie_cve-2021-20230 fkie_cve-2021-20230 2026-10-12T18:16:55.902860+00:00

A flaw was found in stunnel before 5.57, where it improperly validates client certificates when it is configured to use both redirect and verifyChain options. This flaw allows an attacker with a certificate signed by a Certificate Authority, which is not the one accepted by the stunnel server, to access the tunneled service instead of being redirected to the address specified in the redirect option. The highest threat from this vulnerability is to confidentiality.

 https://cve.radiocsirt.org/vuln/ghsa-wwrq-59mq-v8w2 GHSA-wwrq-59mq-v8w2 2026-10-12T18:16:55.902880+00:00

A flaw was found in stunnel before 5.57, where it improperly validates client certificates when it is configured to use both redirect and verifyChain options. This flaw allows an attacker with a certificate signed by a Certificate Authority, which is not the one accepted by the stunnel server, to access the tunneled service instead of being redirected to the address specified in the redirect option. The highest threat from this vulnerability is to confidentiality.

 https://cve.radiocsirt.org/vuln/gsd-2021-20230 gsd-2021-20230 2026-10-12T18:16:55.902895+00:00 gsd-2021-20230 https://cve.radiocsirt.org/vuln/msrc_cve-2021-20230 msrc_CVE-2021-20230 — A flaw was found in stunnel before 5.57 where it improperly validates client certificates when it is configured to use… 2026-10-12T18:16:55.902905+00:00 msrc_CVE-2021-20230 https://cve.radiocsirt.org/vuln/opensuse-su-2021:0409-1 openSUSE-SU-2021:0409-1 — Security update for stunnel 2026-10-12T18:16:55.902920+00:00

Security update for stunnel

 https://cve.radiocsirt.org/vuln/rhsa-2021:0619 RHSA-2021:0619 — Red Hat Security Advisory: stunnel security update 2026-10-12T18:16:55.902934+00:00

stunnel: client certificate not correctly verified when redirect and verifyChain options are used

 https://cve.radiocsirt.org/vuln/suse-su-2021:0772-1 SUSE-SU-2021:0772-1 — Security update for stunnel 2026-10-12T18:16:55.902948+00:00

Security update for stunnel

 https://cve.radiocsirt.org/vuln/ubuntu-cve-2021-20230 UBUNTU-CVE-2021-20230 2026-10-12T18:16:55.902960+00:00

Affected: Ubuntu:Pro:18.04:LTS: stunnel4, Ubuntu:20.04:LTS: stunnel4

A flaw was found in stunnel before 5.57, where it improperly validates client certificates when it is configured to use both redirect and verifyChain options. This flaw allows an attacker with a certificate signed by a Certificate Authority, which is not the one accepted by the stunnel server, to access the tunneled service instead of being redirected to the address specified in the redirect option. The highest threat from this vulnerability is to confidentiality.

 https://cve.radiocsirt.org/vuln/wid-sec-w-2024-1674 WID-SEC-W-2024-1674 — Red Hat Enterprise Linux: Schwachstelle ermöglicht Umgehen von Sicherheitsvorkehrungen 2026-10-12T18:16:55.902990+00:00

Ein entfernter, anonymer Angreifer kann mehrere Schwachstellen in Red Hat Enterprise Linux ausnutzen, um Sicherheitsvorkehrungen zu umgehen.