CVE catalog
CVE-2026-90467
aiosmtplib before 5.1.3 fails to properly validate email addresses supplied by callers, allowing attackers to inject ESMTP parameters into MAIL FROM and RCPT TO command lines. Attackers can craft mali
- Severity
- Medium · CVSS 6.3
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X - Published
- Updated
- Source
- [NVD] · [CVE record]
- EPSS
- 0.39% · Oct 25, 2026
aiosmtplib before 5.1.3 fails to properly validate email addresses supplied by callers, allowing attackers to inject ESMTP parameters into MAIL FROM and RCPT TO command lines. Attackers can craft malicious addresses containing spaces and angle brackets to append parameters like AUTH, NOTIFY, or ORCPT to envelope commands, forging authenticated identities or forcing delivery notifications to third parties.
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 | aiosmtplib | sid | 5.1.3-1 | fixed |
| Debian | aiosmtplib | forky | 5.1.3-1 | fixed |
| Debian | aiosmtplib | trixie | 4.0.0-1 | vulnerable |
| Debian | aiosmtplib | bookworm | 2.0.0-1 | vulnerable |
| Opensuse | python-aiosmtplib | tumbleweed | 5.1.3-1.1 | fixed |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Debian | aiosmtplib | source | sid | 5.1.3-1 | not yet assigned | Not reported | [1147474] |
| Debian | aiosmtplib | source | forky | 5.1.3-1 | not yet assigned | Not reported | [1147474] |
| Debian | aiosmtplib | source | trixie | (unfixed) | not yet assigned | Not reported | [1147474] |
| Debian | aiosmtplib | source | bookworm | (unfixed) | not yet assigned | Not reported | [1147474] |
| Opensuse | python-aiosmtplib | rpm | tumbleweed | 5.1.3-1.1 | Not reported | OPENSUSE-SU-2026:11799-1 | Not reported |
Notes
[trixie] aiosmtplib: Minor issue [bookworm] aiosmtplib: Minor issue
OpenFactory catalog packages
[Debian 12 (Bookworm)]
- [python3-aiosmtplib]Affected
Source package: [aiosmtplib]
Details (2)
2.0.0-1· all · bookwormAffected
nvd · aiosmtplib · debian · bookworm; nvd · aiosmtplib · debian · 12
2.0.0-1· all · bookwormAffected
nvd · aiosmtplib · debian · bookworm; nvd · aiosmtplib · debian · 12
- [python3-aiosmtplib-doc]Affected
Source package: [aiosmtplib]
Details (2)
2.0.0-1· all · bookwormAffected
nvd · aiosmtplib · debian · bookworm; nvd · aiosmtplib · debian · 12
2.0.0-1· all · bookwormAffected
nvd · aiosmtplib · debian · bookworm; nvd · aiosmtplib · debian · 12
[Debian 13 (Trixie)]
- [python3-aiosmtplib]Affected
Source package: [aiosmtplib]
Details (2)
4.0.0-1· all · trixieAffected
nvd · aiosmtplib · debian · 13
4.0.0-1· all · trixieAffected
nvd · aiosmtplib · debian · 13
- [python3-aiosmtplib-doc]Affected
Source package: [aiosmtplib]
Details (2)
4.0.0-1· all · trixieAffected
nvd · aiosmtplib · debian · 13
4.0.0-1· all · trixieAffected
nvd · aiosmtplib · debian · 13
[openSUSE Tumbleweed]
- [python313-aiosmtplib]Unknown
Source package: [python-aiosmtplib]
Details (1)
5.1.2-1.1· noarch · tumbleweedUnknown · Fixed:
5.1.3-1.1Version impact unknown
nvd · python-aiosmtplib · opensuse · tumbleweed
- [python314-aiosmtplib]Unknown
Source package: [python-aiosmtplib]
Details (1)
5.1.2-1.1· noarch · tumbleweedUnknown · Fixed:
5.1.3-1.1Version impact unknown
nvd · python-aiosmtplib · opensuse · tumbleweed
Observed:
References
- [https://ftp.suse.com/pub/projects/security/csaf/opensuse-su-2026_11799-1.json]
- [https://nvd.nist.gov/vuln/detail/CVE-2026-90467]
- [https://osv.dev/vulnerability/DEBIAN-CVE-2026-90467]
- [https://osv.dev/vulnerability/openSUSE-SU-2026:11799-1]
- [https://security-tracker.debian.org/tracker/CVE-2026-90467]
[Debian Security Tracker] · [FIRST EPSS] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database] · [SUSE security advisories and VEX]