CVE catalog
CVE-2026-70463
rsync 3.1.0 before 3.5.0 contains an authorization bypass in auth users directive parsing. The auth users parser uses comma-only tokenization when splitting the user list, which fails to correctly han
- Severity
- High · CVSS 8.6
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/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
- Source
- [NVD] · [CVE record]
- EPSS
- 0.36% · Oct 25, 2026
rsync 3.1.0 before 3.5.0 contains an authorization bypass in auth users directive parsing. The auth users parser uses comma-only tokenization when splitting the user list, which fails to correctly handle entries of the form @Group Name where the group name contains a space. The space within the group name causes the parser to split the entry at the space boundary, discarding the deny rule associated with the group. An authenticated user whose username or group membership would be denied by an @Group Name auth users entry can connect to a restricted module because the deny rule is silently discarded during parsing.
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 | rsync | sid | 3.5.1+ds1-2 | fixed |
| Debian | rsync | forky | 3.5.1+ds1-2 | fixed |
| Debian | rsync | trixie | 3.4.1+ds1-5+deb13u4 | vulnerable |
| Debian | rsync | trixie-security | 3.5.0+ds1-0+deb13u1 | fixed |
| Debian | rsync | bookworm | 3.2.7-1+deb12u6 | vulnerable |
| Debian | rsync | bookworm-security | 3.2.7-1+deb12u5 | vulnerable |
| Cpe | rsync | Not reported | 3.5.0 | fixed |
| Alpine | rsync | 3.21 | 3.5.0-r0 | fixed |
| Alpine | rsync | 3.22 | 3.5.0-r0 | fixed |
| Alpine | rsync | 3.23 | 3.5.0-r0 | fixed |
| Alpine | rsync | 3.24 | 3.5.0-r0 | fixed |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Debian | rsync | source | sid | 3.5.0+ds1-1 | not yet assigned | Not reported | Not reported |
| Debian | rsync | source | forky | 3.5.0+ds1-1 | not yet assigned | Not reported | Not reported |
| Debian | rsync | source | trixie | 3.5.0+ds1-0+deb13u1 | not yet assigned | Not reported | Not reported |
| Debian | rsync | source | bookworm | (unfixed) | not yet assigned | Not reported | Not reported |
| Cpe | rsync | cpe | Not reported | 3.5.0 | Not reported | NVD-CVE-2026-70463 | Not reported |
| Alpine | rsync | apk | 3.21 | 3.5.0-r0 | Not reported | ALPINE-CVE-2026-70463 | Not reported |
| Alpine | rsync | apk | 3.22 | 3.5.0-r0 | Not reported | ALPINE-CVE-2026-70463 | Not reported |
| Alpine | rsync | apk | 3.23 | 3.5.0-r0 | Not reported | ALPINE-CVE-2026-70463 | Not reported |
| Alpine | rsync | apk | 3.24 | 3.5.0-r0 | Not reported | ALPINE-CVE-2026-70463 | Not reported |
OpenFactory catalog packages
[Debian 12 (Bookworm)]
- [rsync]Affected
Details (4)
3.2.7-1+deb12u6· amd64 · bookwormAffected
nvd · rsync · debian · bookworm; nvd · rsync · debian · 12
3.2.7-1+deb12u6· arm64 · bookwormAffected
nvd · rsync · debian · bookworm; nvd · rsync · debian · 12
3.2.7-1+deb12u5· amd64 · bookworm-securityAffected
nvd · rsync · debian · bookworm; nvd · rsync · debian · 12
3.2.7-1+deb12u5· arm64 · bookworm-securityAffected
nvd · rsync · debian · bookworm; nvd · rsync · debian · 12
[Debian 13 (Trixie)]
- [rsync]Affected
Details (5)
3.4.1+ds1-5+deb13u4· amd64 · trixieAffected · Fixed:
3.5.0+ds1-0+deb13u1nvd · rsync · debian · 13
3.4.1+ds1-5+deb13u4· arm64 · trixieAffected · Fixed:
3.5.0+ds1-0+deb13u1nvd · rsync · debian · 13
3.4.1+ds1-5+deb13u3· amd64 · trixie-security · Historical versionAffected · Fixed:
3.5.0+ds1-0+deb13u1nvd · rsync · debian · 13
3.4.1+ds1-5+deb13u3· arm64 · trixie-securityAffected · Fixed:
3.5.0+ds1-0+deb13u1nvd · rsync · debian · 13
3.5.0+ds1-0+deb13u1· amd64 · trixie-securityFixed · Fixed:
3.5.0+ds1-0+deb13u1nvd · rsync · debian · 13
Observed:
References
- [https://ftp.suse.com/pub/projects/security/csaf/suse-su-2026_3634-1.json]
- [https://github.com/RsyncProject/rsync/releases/tag/v3.5.0]
- [https://github.com/RsyncProject/rsync/security/advisories/GHSA-pfj8-79vq-xgvr]
- [https://nvd.nist.gov/vuln/detail/CVE-2026-70463]
- [https://osv.dev/vulnerability/ALPINE-CVE-2026-70463]
- [https://osv.dev/vulnerability/DEBIAN-CVE-2026-70463]
- [https://security-tracker.debian.org/tracker/CVE-2026-70463]
- [https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-70463.json]
- [https://wid.cert-bund.de/.well-known/csaf/white/2026/wid-sec-w-2026-2817.json]
- [https://www.vulncheck.com/advisories/rsync-authorization-bypass-via-auth-users-directive-parsing]
[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]