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, the receiver's compressed-token decoder accumulated a 32-bit signed counter without checking for overflow. A malicious sender can trigger an overflow that with careful manipulation can lead to the extraction of data stored in memory of the process allowing an attacker to access environment variables, passwords and memory pointers from the heap, stack, and libraries. The leakage of these pointers and data can significantly reduce the effectiveness of ASLR and facilitate further exploitation. This issue is fixed in version 3.4.3.
This CVE has been withdrawn by MITRE
MITRE marked CVE-2026-44508 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 The original content below is preserved for historical reference only.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-2026-43618. Reason: This candidate is a duplicate of CVE-2026-43618. Notes: All CVE users should reference CVE-2026-43618 instead of this candidate.
CVE-2026-44508
✕ Withdrawn — historical dataHIGHPre-NVD 8.1
8.1CVSS
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
- High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 8.1Exploit: None knownExposed: 0
No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.
- CVSS v3
- 8.1
- EchelonGraph score
- Not yet assessedThis CVE record was withdrawn by its numbering authority, so there is no vulnerability to rate.
- EG Score
- —
- EG Risk
- —
- EPSS PROB
- 0%
- EPSS %ILE
- 19%
- KEV
- Not listed
Published
July 20, 2026
Last Modified
July 20, 2026
Advisory Details (1)
Auto-updated Jul 20, 2026Patch available. Sources: github.
github Patch Available
rsync: Integer overflow in compressed-token decoding enables remote memory dump · Advisory · RsyncProject/rsync · GitHub
Affected: 3.4.3
https://github.com/RsyncProject/rsync/security/advisories/GHSA-g37v-g3gj-pmwqVendor Advisories for CVE-2026-44508(1)
These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.
Weakness Classification(2)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Data Freshness Timeline
(refreshed 0× in last 7d / 1× in last 30d)
Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.
- 2026-08-01 14:00 UTCEG score recompute
- 2026-07-26 10:46 UTCEG score recompute
- 2026-07-23 03:15 UTCEG score recompute▼ 8.10
- 2026-07-21 15:24 UTCEPSS rescore
- 2026-07-20 22:42 UTCEG score recompute
- 2026-07-20 20:52 UTCEG score recompute
- 2026-07-20 20:52 UTCMITRE cvelistV5first tracked
Related CVEs(same CWE)
Same CWE
10 shownCWE-190 · CWE-200
Frequently asked(5)
What is CVE-2026-44508?
CVE-2026-44508 is a high vulnerability published on July 20, 2026. 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, the receiver's compressed-token decoder accumulated a 32-bit signed counter without checking for overflow. A malicious sender can trigger an overflow that with…
When was CVE-2026-44508 disclosed?
CVE-2026-44508 was first published in the National Vulnerability Database on July 20, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-44508 actively exploited?
CVE-2026-44508 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 80.6% of all scored CVEs.
What is the CVSS score of CVE-2026-44508?
CVE-2026-44508 has a CVSS v3 base score of 8.1 (NVD).
How do I remediate CVE-2026-44508?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-44508, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.
Dependency Blast Radius
Explore the affected products and dependency analysis for CVE-2026-44508
Is Your Infrastructure Affected by CVE-2026-44508?
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