Vulnerability details
CVE-2026-53799
RsyncProject rsync
rsync < 3.5.0 Symlink Race Condition via ACL/xattr Application
CVSS 4.0
7.2High
Official description
rsync before 3.5.0 contains a symlink race condition vulnerability that allows local attackers to cause rsync to apply arbitrary ACLs or extended attributes to unintended files by substituting a symlink at a predictable destination path between the file write and the subsequent acl_set_file() or lsetxattr() call. Attackers can exploit this timing window to redirect ACL and xattr application through a crafted symlink to files outside the intended destination tree, potentially granting elevated permissions and enabling local privilege escalation.
CVSS scores
| Score | Version | Source | Vector |
|---|---|---|---|
| 7.2High | 4.0 | CVEProject cvelistV5 (CNA) (VulnCheck) | CVSS:4.0/AV:L/AC:H/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N |
| 6.3Medium | 3.1 | CVEProject cvelistV5 (CNA) (VulnCheck) | CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/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)
0.12%
Probability of exploitation in 30 days
2%
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