CVE-2026-53796
MEDIUMDescription
rsync before 3.5.0 contains a time-of-check to time-of-use (TOCTOU) race condition vulnerability in the non-daemon receiver's destination directory handling that allows an attacker who can manipulate destination path parent components to redirect file writes to unintended locations. Attackers can substitute a symlink for a component of the destination path between the path resolution and chdir() call, causing the receiver's working directory to be established outside the intended destination tree so that subsequent relative-path file writes land in unintended filesystem locations.
How to fix
TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works
Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.
CVSS v3 Vector
Exploitability
Impact
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:H
Exploit Intelligence
Low risk: more likely to be exploited than 1% of all known CVEs.
References
Related Vulnerabilities
Other CWE-59 (Link Following) vulnerabilities, ordered by exploit likelihood. View all
| CVE | Severity | CVSS | EPSS | Exploited | Fix |
|---|---|---|---|---|---|
| CVE-2022-30333 | High | 7.5 | 99% | KEV + Ransom | Fix |
| CVE-2021-21300 | High | 8.0 | 89% | - | Fix |
| CVE-2021-32610 | High | 7.1 | 73% | - | Fix |
| CVE-2020-36193 | High | 7.5 | 71% | KEV | Fix |
| CVE-2023-40028 | Medium | 4.9 | 69% | - | Fix |
| CVE-2023-36874 | High | 7.8 | 43% | KEV | Fix |
Common questions
How do I fix CVE-2026-53796?
Upgrade rsync on debian unstable to 3.5.0+ds1-1 or later.
Is CVE-2026-53796 being actively exploited?
Not that we know of. CVE-2026-53796 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 0.09% is the estimated probability that it will be exploited in the next 30 days. That is higher than 1% of all scored CVEs.
How severe is CVE-2026-53796?
CVE-2026-53796 has a CVSS v3 base score of 6.3, rated moderate. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.
What does CVE-2026-53796 affect?
Published advisories record a fix for rsync (Debian). Only products with a sourced advisory are listed, so treat this as what we can cite rather than a complete inventory.
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Markdown
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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-08-14.