Internal data exposure via unchecked peer address
Published Sep 15, 2026 · Updated Sep 15, 2026
SSRF in the Dragonfly scheduler before 2.4.4-rc.3 allows remote attackers to read up to 128 bytes from reachable internal HTTP services. DownloadTinyFile builds an HTTP GET destination directly from PeerHost.Ip and PeerHost.DownPort without address validation, then stores the response in Task.DirectPiece. Exploitation requires network access to the default unauthenticated v1 gRPC service and is limited to ports 1024 through 65534.
Summary
What happened
SSRF in the Dragonfly scheduler before 2.4.4-rc.3 allows remote attackers to read up to 128 bytes from reachable internal HTTP services. DownloadTinyFile builds an HTTP GET destination directly from PeerHost.Ip and PeerHost.DownPort without address validation, then stores the response in Task.DirectPiece. Exploitation requires network access to the default unauthenticated v1 gRPC service and is limited to ports 1024 through 65534.
The record
- CVE
- CVE-2026-54637
- Published
- Sep 15, 2026
- Updated
- Sep 15, 2026
- Vendor
- DragonflyDB
- Product
- Dragonfly
- Classifications
- CWE-918, T1190
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Sep 15, 2026CVE publishedPublication date reported by the CVE source.
- Sep 15, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=< 2.4.4-rc.3
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
- Upstream DownloadTinyFile SSRF proof of conceptproof of concept · demonstrated
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
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Your stack
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