# mail (RubyGems) vulnerabilities

Source: https://junglewise.ai/threats/technologies/mail  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Updated: 13 November 2026, 03:07 UTC. Rebuilt every hour.  
Data: https://junglewise.ai/threats/technologies/mail.json  
License: CC BY 4.0 with a link back

Junglewise Threat Intelligence has tracked 5 vulnerabilities in mail (RubyGems): 0 in the last 7 days and 1 in the last 90 days, 0 of them critical and 0 exploited in the wild. The most recent, CVE-2026-63435, was published on 1 September 2026. Nothing was published in the last eight weeks.

## Counts

- Last 7 days: 0
- Last 30 days: 0
- Last 90 days: 1
- All time: 5 (0 critical, 0 exploited in the wild)

## About mail (RubyGems)

Ruby gem for composing and delivering email messages.

## Latest mail (RubyGems) vulnerabilities

- [CVE-2026-63435: mail email address spoofing via malformed RFC 2047 encoded-words](https://junglewise.ai/threats/cve-2026-63435-mail-email-address-spoofing-via-malformed-rfc-2047-encoded-words) (medium, CVSS 5.3, published 1 Sep 2026)
- [CVE-2012-2140: Mail Gem Improper Input Validation vulnerability](https://junglewise.ai/threats/cve-2012-2140-mail-gem-improper-input-validation-vulnerability) (info, published 24 Oct 2017)
- [CVE-2012-2139: Mail Gem Path Traversal vulnerability](https://junglewise.ai/threats/cve-2012-2139-mail-gem-path-traversal-vulnerability) (info, published 24 Oct 2017)
- [CVE-2011-0739: Mail Improper Input Validation vulnerability](https://junglewise.ai/threats/cve-2011-0739-mail-improper-input-validation-vulnerability) (info, published 24 Oct 2017)
- [CVE-2015-9097: Mail Gem CRLF Injection vulnerability](https://junglewise.ai/threats/cve-2015-9097-mail-gem-crlf-injection-vulnerability) (low, CVSS 3, published 24 Oct 2017)

## Most severe mail (RubyGems) vulnerabilities

- [CVE-2026-63435: mail email address spoofing via malformed RFC 2047 encoded-words](https://junglewise.ai/threats/cve-2026-63435-mail-email-address-spoofing-via-malformed-rfc-2047-encoded-words) (medium, CVSS 5.3, published 1 Sep 2026)
- [CVE-2015-9097: Mail Gem CRLF Injection vulnerability](https://junglewise.ai/threats/cve-2015-9097-mail-gem-crlf-injection-vulnerability) (low, CVSS 3, published 24 Oct 2017)
- [CVE-2012-2139: Mail Gem Path Traversal vulnerability](https://junglewise.ai/threats/cve-2012-2139-mail-gem-path-traversal-vulnerability) (info, published 24 Oct 2017)
- [CVE-2012-2140: Mail Gem Improper Input Validation vulnerability](https://junglewise.ai/threats/cve-2012-2140-mail-gem-improper-input-validation-vulnerability) (info, published 24 Oct 2017)
- [CVE-2011-0739: Mail Improper Input Validation vulnerability](https://junglewise.ai/threats/cve-2011-0739-mail-improper-input-validation-vulnerability) (info, published 24 Oct 2017)

## Vulnerabilities per week

Nothing was published in the last eight weeks.

| Week of | Vulns | Critical | Exploited |
| --- | --- | --- | --- |
| 17 Aug 2026 | 0 | 0 | 0 |
| 24 Aug 2026 | 0 | 0 | 0 |
| 31 Aug 2026 | 1 | 0 | 0 |
| 7 Sep 2026 | 0 | 0 | 0 |
| 14 Sep 2026 | 0 | 0 | 0 |
| 21 Sep 2026 | 0 | 0 | 0 |
| 28 Sep 2026 | 0 | 0 | 0 |
| 5 Oct 2026 | 0 | 0 | 0 |
| 12 Oct 2026 | 0 | 0 | 0 |
| 19 Oct 2026 | 0 | 0 | 0 |
| 26 Oct 2026 | 0 | 0 | 0 |
| 2 Nov 2026 | 0 | 0 | 0 |
| 9 Nov 2026 | 0 | 0 | 0 |

## Other RubyGems technologies

- [actionpack (RubyGems)](https://junglewise.ai/threats/technologies/actionpack): 77 vulnerabilities
- [nokogiri (RubyGems)](https://junglewise.ai/threats/technologies/nokogiri): 69 vulnerabilities
- [rack (RubyGems)](https://junglewise.ai/threats/technologies/rack): 55 vulnerabilities
- [activerecord (RubyGems)](https://junglewise.ai/threats/technologies/rubygems-activerecord): 26 vulnerabilities
- [rubygems-update (RubyGems)](https://junglewise.ai/threats/technologies/rubygems-update): 25 vulnerabilities
- [puppet (RubyGems)](https://junglewise.ai/threats/technologies/puppet): 23 vulnerabilities
- [activesupport (RubyGems)](https://junglewise.ai/threats/technologies/activesupport): 20 vulnerabilities
- [actionview (RubyGems)](https://junglewise.ai/threats/technologies/actionview): 19 vulnerabilities
- [activestorage (RubyGems)](https://junglewise.ai/threats/technologies/activestorage): 19 vulnerabilities
- [camaleon_cms (RubyGems)](https://junglewise.ai/threats/technologies/camaleon-cms): 19 vulnerabilities
- [rails-html-sanitizer (RubyGems)](https://junglewise.ai/threats/technologies/rails-html-sanitizer): 18 vulnerabilities
- [loofah (RubyGems)](https://junglewise.ai/threats/technologies/loofah): 17 vulnerabilities

## Sources

NVD, GitHub Security Advisories, OSV, the CISA Known Exploited Vulnerabilities catalog, FIRST EPSS and vendor advisories. Rebuilt every hour. Cite as: Junglewise Threat Intelligence, "mail (RubyGems) vulnerabilities", https://junglewise.ai/threats/technologies/mail, 13 November 2026.