CVE-2026-104192 Dragonfly - Use After Free

Dragonfly < 1.40 contains a double-free vulnerability caused by improper cleanup of shared objects in OpaqueObjLoader::CreateStream, letting unauthenticated clients cause denial of service or remote code execution via crafted RESTORE streams.

CVSS base score 9.6 /10
Critical
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
EPSS
0.28% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Use After Free
Impact
Denial Of Service, Remote Code Execution
CVSS vector
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
Published
13 October 2026
Updated
15 October 2026
Weakness
CWE-415

Vendor fix

Update to a version including the fix after 1.40 or apply the source fix when available.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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