Rsync is a file-copying tool that uses a delta-transfer algorithm to synchronize remote and local files. In versions prior to 3.4.3, when using a daemon configured with a chroot, the reverse DNS lookup of the connecting client was performed after the chroot had been entered. If the chroot did not contain the files glibc needs for resolution (/etc/resolv.conf, /etc/nsswitch.conf, /etc/hosts, NSS service modules), the lookup failed and the connecting hostname was set to "UNKNOWN". Hostname-based deny rules ("hosts deny = *.evil.example") therefore could not match, and an attacker who controlled the PTR record for their source IP could connect from a hostname that the administrator had intended to deny. IP-based ACLs ("hosts allow = 10.0.0.0/8") are unaffected. This issue is fixed in version 3.4.3.
This CVE has been withdrawn by MITRE
MITRE marked CVE-2026-44507 as REJECTED on . It is no longer considered a valid vulnerability record. The original content below is preserved for historical reference only.
Reason given by MITRE
** REJECT ** DO NOT USE THIS CANDIDATE NUMBER. ConsultIDs: CVE-2026-43617. Reason: This candidate is a duplicate of CVE-2026-43617. Notes: All CVE users should reference CVE-2026-43617 instead of this candidate.
CVE-2026-44507
✕ Withdrawn — historical dataMEDIUMPre-NVD 4.8
4.8CVSS
- CVSS v3
- 4.8
- EchelonGraph score
- Not yet assessedThis CVE record was withdrawn by its numbering authority, so there is no vulnerability to rate.
- EPSS PROB
- —
- EPSS %ILE
- —
- KEV
- —Not applicable: this CVE ID was withdrawn
Published
July 20, 2026
Last Modified
July 21, 2026
References (1)
- security-advisories@githubhttps://github.com/RsyncProject/rsync/security/advisories/GHSA-rjfm-3w2m-jf4f
Frequently asked(4)
What is CVE-2026-44507?
CVE-2026-44507 is a rejected CVE ID: its record was withdrawn on July 21, 2026 and no longer describes a vulnerability. Reason given: ** REJECT ** DO NOT USE THIS CANDIDATE NUMBER. ConsultIDs: CVE-2026-43617. Reason: This candidate is a duplicate of CVE-2026-43617. Notes: All CVE users should reference CVE-2026-43617 instead of this candidate. Its record names CVE-2026-43617 as the replacement.
When was the CVE record for CVE-2026-44507 published?
The CVE record for CVE-2026-44507 was published on July 20, 2026. EchelonGraph's copy of the record carries a last-modified date of July 21, 2026; the record at its source may have been updated since.
What is the CVSS score of CVE-2026-44507?
CVE-2026-44507 has a CVSS base score of 4.8 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-44507?
There is nothing to remediate under CVE-2026-44507: it is a rejected (withdrawn) CVE ID and no longer describes a vulnerability. Its record names CVE-2026-43617 as the replacement; act on that CVE instead.