https://patchthecve.com/CVEs with upgrade or downgrade fix stepshttps://patchthecve.com/cve/CVE-2021-37746.htmlhttps://patchthecve.com/cve/CVE-2021-37746.htmlWed, 17 Jun 2026 04:01:05 +0000MEDIUM 6.1: textview_uri_security_check in textview.c in Claws Mail before 3.18.0, and Sylpheed through 3.7.0, does not have sufficient link checks before accepting a click.https://patchthecve.com/cve/CVE-2020-16094.htmlhttps://patchthecve.com/cve/CVE-2020-16094.htmlWed, 17 Jun 2026 02:57:42 +0000HIGH 7.5: In imap_scan_tree_recursive in Claws Mail through 3.17.6, a malicious IMAP server can trigger stack consumption because of unlimited recursion into subdirectories during a rebuild of the folder tree.https://patchthecve.com/cve/CVE-2020-15917.htmlhttps://patchthecve.com/cve/CVE-2020-15917.htmlWed, 17 Jun 2026 02:57:23 +0000CRITICAL 9.8: common/session.c in Claws Mail before 3.17.6 has a protocol violation because suffix data after STARTTLS is mishandled.https://patchthecve.com/cve/CVE-2015-8708.htmlhttps://patchthecve.com/cve/CVE-2015-8708.htmlWed, 17 Jun 2026 00:35:04 +0000HIGH 7.3: Stack-based buffer overflow in the conv_euctojis function in codeconv.c in Claws Mail 3.13.1 allows remote attackers to have unspecified impact via a crafted email, involving Japanese character set conversion. NOTE: this vulnerability exists because of an incomplete fix for CVE-2015-8614.https://patchthecve.com/cve/CVE-2015-8614.htmlhttps://patchthecve.com/cve/CVE-2015-8614.htmlWed, 17 Jun 2026 00:34:51 +0000HIGH 7.3: Multiple stack-based buffer overflows in the (1) conv_jistoeuc, (2) conv_euctojis, and (3) conv_sjistoeuc functions in codeconv.c in Claws Mail before 3.13.1 allow remote attackers to have unspecified impact via a crafted email, involving Japanese character set conversion.https://patchthecve.com/cve/CVE-2014-2576.htmlhttps://patchthecve.com/cve/CVE-2014-2576.htmlWed, 17 Jun 2026 00:06:49 +0000MEDIUM 6.8: plugins/rssyl/feed.c in Claws Mail before 3.10.0 disables the CURLOPT_SSL_VERIFYHOST check for CN or SAN host name fields, which makes it easier for remote attackers to spoof servers and conduct man-in-the-middle (MITM) attacks.https://patchthecve.com/cve/CVE-2012-4507.htmlhttps://patchthecve.com/cve/CVE-2012-4507.htmlTue, 16 Jun 2026 23:45:13 +0000MEDIUM 5.0: The strchr function in procmime.c in Claws Mail (aka claws-mail) 3.8.1 allows remote attackers to cause a denial of service (NULL pointer dereference and crash) via a crafted email.