currently we have version www-client/w3m-0.5.3_p20190105
vulner reported this CVEs:

• https://nvd.nist.gov/vuln/detail/CVE-2018-6196
• https://nvd.nist.gov/vuln/detail/CVE-2018-6198
• https://nvd.nist.gov/vuln/detail/CVE-2018-6197
• https://nvd.nist.gov/vuln/detail/CVE-2016-9435
• https://nvd.nist.gov/vuln/detail/CVE-2016-9436
• https://nvd.nist.gov/vuln/detail/CVE-2016-9443
• https://nvd.nist.gov/vuln/detail/CVE-2016-9442
• https://nvd.nist.gov/vuln/detail/CVE-2016-9441
• https://nvd.nist.gov/vuln/detail/CVE-2016-9440
• https://nvd.nist.gov/vuln/detail/CVE-2016-9439
• https://nvd.nist.gov/vuln/detail/CVE-2016-9438
• https://nvd.nist.gov/vuln/detail/CVE-2016-9437
• https://nvd.nist.gov/vuln/detail/CVE-2016-9434
• https://nvd.nist.gov/vuln/detail/CVE-2016-9433
• https://nvd.nist.gov/vuln/detail/CVE-2016-9432
• https://nvd.nist.gov/vuln/detail/CVE-2016-9431
• https://nvd.nist.gov/vuln/detail/CVE-2016-9430
• https://nvd.nist.gov/vuln/detail/CVE-2016-9429
• https://nvd.nist.gov/vuln/detail/CVE-2016-9428
• https://nvd.nist.gov/vuln/detail/CVE-2016-9426

now, I'm not sure which one of them are fixed in our current version w3m-0.5.3_p20190105 but thanks to https://security-tracker.debian.org/tracker/source-package/w3m and https://lists.debian.org/debian-lts-announce/2020/04/msg00025.html I can tell that high severity CVE-2018-6196 was fixed at 30 Apr 2020 - so I assume that the fix is not present in 0.5.3_p20190105