CVE catalog
CVE-2026-109399
SWUpdate through 2026.05.1 contains an improper certificate validation vulnerability in crypto/swupdate_cms_verify_openssl.c that trusts untrusted X.509 certificates embedded in CMS SignedData for cha
- Severity
- Critical · CVSS 9.2
CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/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
- 0.21% · Oct 25, 2026
SWUpdate through 2026.05.1 contains an improper certificate validation vulnerability in crypto/swupdate_cms_verify_openssl.c that trusts untrusted X.509 certificates embedded in CMS SignedData for chain building. Attackers holding a signing key from a sibling intermediate under the same root can embed that intermediate in the signature to install malicious updates.
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 | swupdate | sid | 2026.05.1+git20261001+dfsg-2 | fixed |
| Debian | swupdate | forky | 2026.05.1+git20261001+dfsg-2 | fixed |
| Debian | swupdate | trixie | 2024.12.1+dfsg-3+deb13u2 | not affected |
| Debian | swupdate | bookworm | 2022.12+dfsg-4+deb12u2 | vulnerable |
| Debian | swupdate | bookworm-security | 2022.12+dfsg-4+deb12u3 | fixed |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Debian | swupdate | source | sid | 2026.05+dfsg-1 | not yet assigned | Not reported | Not reported |
| Debian | swupdate | source | forky | 2026.05+dfsg-1 | not yet assigned | Not reported | Not reported |
| Debian | swupdate | source | trixie | Not affected | unimportant | Not reported | Not reported |
| Debian | swupdate | source | bookworm | 2022.12+dfsg-4+deb12u3 | not yet assigned | Not reported | Not reported |
OpenFactory catalog packages
[Debian 12 (Bookworm)]
- [libswupdate0.1]Affected
Source package: [swupdate]
Details (4)
2022.12+dfsg-4+deb12u2· amd64 · bookwormAffected · Fixed:
2022.12+dfsg-4+deb12u3nvd · swupdate · debian · bookworm; nvd · swupdate · debian · 12
2022.12+dfsg-4+deb12u2· arm64 · bookwormAffected · Fixed:
2022.12+dfsg-4+deb12u3nvd · swupdate · debian · bookworm; nvd · swupdate · debian · 12
2024.12.1+dfsg-3~bpo12+1· amd64 · bookworm-backportsFixed · Fixed:
2022.12+dfsg-4+deb12u3nvd · swupdate · debian · bookworm; nvd · swupdate · debian · 12
2024.12.1+dfsg-3~bpo12+1· arm64 · bookworm-backportsFixed · Fixed:
2022.12+dfsg-4+deb12u3nvd · swupdate · debian · bookworm; nvd · swupdate · debian · 12
- [libswupdate-dev]Affected
Source package: [swupdate]
Details (4)
2022.12+dfsg-4+deb12u2· amd64 · bookwormAffected · Fixed:
2022.12+dfsg-4+deb12u3nvd · swupdate · debian · bookworm; nvd · swupdate · debian · 12
2022.12+dfsg-4+deb12u2· arm64 · bookwormAffected · Fixed:
2022.12+dfsg-4+deb12u3nvd · swupdate · debian · bookworm; nvd · swupdate · debian · 12
2024.12.1+dfsg-3~bpo12+1· amd64 · bookworm-backportsFixed · Fixed:
2022.12+dfsg-4+deb12u3nvd · swupdate · debian · bookworm; nvd · swupdate · debian · 12
2024.12.1+dfsg-3~bpo12+1· arm64 · bookworm-backportsFixed · Fixed:
2022.12+dfsg-4+deb12u3nvd · swupdate · debian · bookworm; nvd · swupdate · debian · 12
- [lua-swupdate]Affected
Source package: [swupdate]
Details (4)
2022.12+dfsg-4+deb12u2· amd64 · bookwormAffected · Fixed:
2022.12+dfsg-4+deb12u3nvd · swupdate · debian · bookworm; nvd · swupdate · debian · 12
2022.12+dfsg-4+deb12u2· arm64 · bookwormAffected · Fixed:
2022.12+dfsg-4+deb12u3nvd · swupdate · debian · bookworm; nvd · swupdate · debian · 12
2024.12.1+dfsg-3~bpo12+1· amd64 · bookworm-backportsFixed · Fixed:
2022.12+dfsg-4+deb12u3nvd · swupdate · debian · bookworm; nvd · swupdate · debian · 12
2024.12.1+dfsg-3~bpo12+1· arm64 · bookworm-backportsFixed · Fixed:
2022.12+dfsg-4+deb12u3nvd · swupdate · debian · bookworm; nvd · swupdate · debian · 12
- [swupdate]Affected
Details (4)
2022.12+dfsg-4+deb12u2· amd64 · bookwormAffected · Fixed:
2022.12+dfsg-4+deb12u3nvd · swupdate · debian · bookworm; nvd · swupdate · debian · 12
2022.12+dfsg-4+deb12u2· arm64 · bookwormAffected · Fixed:
2022.12+dfsg-4+deb12u3nvd · swupdate · debian · bookworm; nvd · swupdate · debian · 12
2024.12.1+dfsg-3~bpo12+1· amd64 · bookworm-backportsFixed · Fixed:
2022.12+dfsg-4+deb12u3nvd · swupdate · debian · bookworm; nvd · swupdate · debian · 12
2024.12.1+dfsg-3~bpo12+1· arm64 · bookworm-backportsFixed · Fixed:
2022.12+dfsg-4+deb12u3nvd · swupdate · debian · bookworm; nvd · swupdate · debian · 12
- [swupdate-doc]Affected
Source package: [swupdate]
Details (4)
2022.12+dfsg-4+deb12u2· all · bookwormAffected · Fixed:
2022.12+dfsg-4+deb12u3nvd · swupdate · debian · bookworm; nvd · swupdate · debian · 12
2022.12+dfsg-4+deb12u2· all · bookwormAffected · Fixed:
2022.12+dfsg-4+deb12u3nvd · swupdate · debian · bookworm; nvd · swupdate · debian · 12
2024.12.1+dfsg-3~bpo12+1· all · bookworm-backportsFixed · Fixed:
2022.12+dfsg-4+deb12u3nvd · swupdate · debian · bookworm; nvd · swupdate · debian · 12
2024.12.1+dfsg-3~bpo12+1· all · bookworm-backportsFixed · Fixed:
2022.12+dfsg-4+deb12u3nvd · swupdate · debian · bookworm; nvd · swupdate · debian · 12
- [swupdate-www]Affected
Source package: [swupdate]
Details (4)
2022.12+dfsg-4+deb12u2· all · bookwormAffected · Fixed:
2022.12+dfsg-4+deb12u3nvd · swupdate · debian · bookworm; nvd · swupdate · debian · 12
2022.12+dfsg-4+deb12u2· all · bookwormAffected · Fixed:
2022.12+dfsg-4+deb12u3nvd · swupdate · debian · bookworm; nvd · swupdate · debian · 12
2024.12.1+dfsg-3~bpo12+1· all · bookworm-backportsFixed · Fixed:
2022.12+dfsg-4+deb12u3nvd · swupdate · debian · bookworm; nvd · swupdate · debian · 12
2024.12.1+dfsg-3~bpo12+1· all · bookworm-backportsFixed · Fixed:
2022.12+dfsg-4+deb12u3nvd · swupdate · debian · bookworm; nvd · swupdate · debian · 12
Observed: