CVE catalog
CVE-2026-47242
Net::IMAP implements Internet Message Access Protocol (IMAP) client functionality in Ruby. Prior to 0.6.5 and 0.5.15, when Net::IMAP#id is called with a hash argument, although the ID field value stri
- Severity
- High · CVSS 7.3
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N - Published
- Source
- [NVD] · [CVE record]
- EPSS
- 0.18% · Oct 25, 2026
Net::IMAP implements Internet Message Access Protocol (IMAP) client functionality in Ruby. Prior to 0.6.5 and 0.5.15, when Net::IMAP#id is called with a hash argument, although the ID field value strings are correctly quoted (escaping quoted specials), they were not validated to prohibit CRLF sequences. While Net::IMAP#enable does process its arguments for aliases, it does not validate them as valid atoms (or as a list of valid atoms). The #to_s value is sent verbatim. Arguments to either command could be used by an attacker to inject arbitrary IMAP commands. This vulnerability is fixed in 0.6.5 and 0.5.15.
Vulnerable and fixed packages
Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.
| Distribution | Package | Release | Version | Status |
|---|---|---|---|---|
| Debian | ruby3.1 | bookworm | 3.1.2-7+deb12u1 | vulnerable |
| Debian | ruby3.1 | bookworm-security | 3.1.2-7+deb12u1 | vulnerable |
| Cpe | ruby3.1 | Not reported | Not reported | vulnerable |
| Alpine | ruby-net-imap | 3.24 | 0.5.15-r0 | fixed |
| Alpine | ruby-net-imap | 3.23 | 0.5.15-r0 | fixed |
| Alpine | ruby-net-imap | 3.21 | 0.4.25-r0 | fixed |
| Alpine | ruby-net-imap | 3.22 | 0.5.15-r0 | fixed |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Debian | ruby3.1 | source | bookworm | (unfixed) | not yet assigned | Not reported | Not reported |
| Alpine | ruby-net-imap | apk | 3.24 | 0.5.15-r0 | Not reported | ALPINE-CVE-2026-47242 | Not reported |
| Alpine | ruby-net-imap | apk | 3.23 | 0.5.15-r0 | Not reported | ALPINE-CVE-2026-47242 | Not reported |
| Alpine | ruby-net-imap | apk | 3.21 | 0.4.25-r0 | Not reported | ALPINE-CVE-2026-47242 | Not reported |
| Alpine | ruby-net-imap | apk | 3.22 | 0.5.15-r0 | Not reported | ALPINE-CVE-2026-47242 | Not reported |
OpenFactory catalog packages
[Debian 12 (Bookworm)]
- [libruby3.1]Affected
Source package: [ruby3.1]
Details (4)
3.1.2-7+deb12u1· amd64 · bookwormAffected
nvd · ruby3.1 · debian · bookworm; nvd · ruby3.1 · debian · 12
3.1.2-7+deb12u1· arm64 · bookwormAffected
nvd · ruby3.1 · debian · bookworm; nvd · ruby3.1 · debian · 12
3.1.2-7+deb12u1· amd64 · bookworm-securityAffected
nvd · ruby3.1 · debian · bookworm; nvd · ruby3.1 · debian · 12
3.1.2-7+deb12u1· arm64 · bookworm-securityAffected
nvd · ruby3.1 · debian · bookworm; nvd · ruby3.1 · debian · 12
- [ruby3.1]Affected
Details (4)
3.1.2-7+deb12u1· amd64 · bookwormAffected
nvd · ruby3.1 · debian · bookworm; nvd · ruby3.1 · debian · 12
3.1.2-7+deb12u1· arm64 · bookwormAffected
nvd · ruby3.1 · debian · bookworm; nvd · ruby3.1 · debian · 12
3.1.2-7+deb12u1· amd64 · bookworm-securityAffected
nvd · ruby3.1 · debian · bookworm; nvd · ruby3.1 · debian · 12
3.1.2-7+deb12u1· arm64 · bookworm-securityAffected
nvd · ruby3.1 · debian · bookworm; nvd · ruby3.1 · debian · 12
- [ruby3.1-dev]Affected
Source package: [ruby3.1]
Details (4)
3.1.2-7+deb12u1· amd64 · bookwormAffected
nvd · ruby3.1 · debian · bookworm; nvd · ruby3.1 · debian · 12
3.1.2-7+deb12u1· arm64 · bookwormAffected
nvd · ruby3.1 · debian · bookworm; nvd · ruby3.1 · debian · 12
3.1.2-7+deb12u1· amd64 · bookworm-securityAffected
nvd · ruby3.1 · debian · bookworm; nvd · ruby3.1 · debian · 12
3.1.2-7+deb12u1· arm64 · bookworm-securityAffected
nvd · ruby3.1 · debian · bookworm; nvd · ruby3.1 · debian · 12
- [ruby3.1-doc]Affected
Source package: [ruby3.1]
Details (4)
3.1.2-7+deb12u1· all · bookwormAffected
nvd · ruby3.1 · debian · bookworm; nvd · ruby3.1 · debian · 12
3.1.2-7+deb12u1· all · bookwormAffected
nvd · ruby3.1 · debian · bookworm; nvd · ruby3.1 · debian · 12
3.1.2-7+deb12u1· all · bookworm-securityAffected
nvd · ruby3.1 · debian · bookworm; nvd · ruby3.1 · debian · 12
3.1.2-7+deb12u1· all · bookworm-securityAffected
nvd · ruby3.1 · debian · bookworm; nvd · ruby3.1 · debian · 12
[Debian 13 (Trixie)]
- [libruby3.3]Affected
Source package: [ruby3.3]
Details (2)
3.3.8-2· amd64 · trixieAffected
nvd · ruby3.3 · debian · 13
3.3.8-2· arm64 · trixieAffected
nvd · ruby3.3 · debian · 13
- [ruby3.3]Affected
Details (2)
3.3.8-2· amd64 · trixieAffected
nvd · ruby3.3 · debian · 13
3.3.8-2· arm64 · trixieAffected
nvd · ruby3.3 · debian · 13
- [ruby3.3-dev]Affected
Source package: [ruby3.3]
Details (2)
3.3.8-2· amd64 · trixieAffected
nvd · ruby3.3 · debian · 13
3.3.8-2· arm64 · trixieAffected
nvd · ruby3.3 · debian · 13
- [ruby3.3-doc]Affected
Source package: [ruby3.3]
Details (2)
3.3.8-2· all · trixieAffected
nvd · ruby3.3 · debian · 13
3.3.8-2· all · trixieAffected
nvd · ruby3.3 · debian · 13
Observed:
References
- [https://ftp.suse.com/pub/projects/security/csaf/suse-su-2026_3090-1.json]
- [https://github.com/ruby/net-imap/security/advisories/GHSA-46q3-7gv7-qmgg]
- [https://nvd.nist.gov/vuln/detail/CVE-2026-47242]
- [https://osv.dev/vulnerability/ALPINE-CVE-2026-47242]
- [https://osv.dev/vulnerability/DEBIAN-CVE-2026-47242]
- [https://security-tracker.debian.org/tracker/CVE-2026-47242]
- [https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-47242.json]
- [https://wid.cert-bund.de/.well-known/csaf/white/2026/wid-sec-w-2026-2379.json]
[CERT-Bund public advisories] · [Debian Security Tracker] · [FIRST EPSS] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX] · [SUSE security advisories and VEX]