Vulnerability details
CVE-2026-53801
RsyncProject rsync
rsync < 3.5.0 Symlink Race Condition Directory Traversal
CVSS 4.0
8.2High
Official description
rsync before 3.5.0 contains a symlink race condition vulnerability in the sender's directory scanning logic that allows attackers to cause the sender to enumerate and transfer files outside the module root's intended subtree. Attackers who can create or manipulate symlinks in a path component of the scanned tree can replace a symlink with a directory entry pointing outside the module root between the lstat() call and the subsequent opendir() call, exposing files beyond the intended root in both daemon-mode and non-daemon sender-side scanning.
CVSS scores
| Score | Version | Source | Vector |
|---|---|---|---|
| 8.2High | 4.0 | CVEProject cvelistV5 (CNA) (VulnCheck) | CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N |
| 5.9Medium | 3.1 | CVEProject cvelistV5 (CNA) (VulnCheck) | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N |
Affected products
| Vendor | Product | Versions | Source |
|---|---|---|---|
| RsyncProject | rsync | v ≤ 3.4.4 | CVEProject cvelistV5 (CNA) |
References and advisories
3
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Details
- Published
- 2026-08-13
- Last updated
- 2026-08-14
- State
- Published
- Assigner (CNA)
- VulnCheck
Exploit prediction (EPSS)
0.28%
Probability of exploitation in 30 days
21.1%
Percentile (among all CVEs)
SSVC assessment (CISA)
- Automatable
- No
- Exploitation
- None
- Technical impact
- Partial
Weaknesses (CWE)
- CWE-59Improper Link Resolution Before File Access ('Link Following')
- CWE-367Time-of-check Time-of-use (TOCTOU) Race Condition