CVE-2026-104635 elixir-protobuf protobuf - Denial of Service

elixir-protobuf protobuf >= 0.8.0 contains an uncontrolled recursion vulnerability caused by missing depth checks in Protobuf.JSON.Decode for self-referential or cyclic message types, letting unauthenticated remote attackers crash the decoding process via deeply nested JSON documents, exploit requires crafted deeply nested JSON input.

CVSS base score 8.2 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
EPSS
0.39% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Denial of Service
Impact
Denial Of Service
CVSS vector
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Published
9 October 2026
Updated
15 October 2026
Weakness
CWE-674

Vendor fix

Update to the latest version where depth checks are properly implemented.

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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