TI-2026-27610 Aliases CVE-2026-35480 GHSA-378j-3jfj-8r9f

go-ipld-prime's DAG-CBOR decoder unbounded memory allocation from CBOR headers

LOW 27CWE-770Published 2026-04-07 · Updated 2026-04-09

Key facts

Attack vector: Local
Privileges required: None
User interaction: None
Attack complexity: Low
Impact type: Denial of service
Confidentiality · integrity · availability: None · None · High
Fix status: Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub. Impact type from CWE-770.

Summary

go-ipld-prime is an implementation of the InterPlanetary Linked Data (IPLD) spec interfaces, a batteries-included codec implementations of IPLD for CBOR and JSON, and tooling for basic operations on IPLD objects. Prior to 0.22.0, the DAG-CBOR decoder uses collection sizes declared in CBOR headers as Go preallocation hints for maps and lists. The decoder does not cap these size hints or account for their cost in its allocation budget, allowing small payloads to cause excessive memory allocation. This vulnerability is fixed in 0.22.0.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00162 5th percentileScored 2026-11-07

Fix Fixed go-ipld-prime (ipld): 0.22.0github.com/ipld/go-ipld-prime (Go): 0.22.0

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: No
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
ipld	go-ipld-prime	before 0.22.0	0.22.0	Patch available	CNA
—	github.com/ipld/go-ipld-prime (Go)	before 0.22.0	0.22.0	Patch available	GHSA-378j-3jfj-8r9f

go-ipld-prime Vendoripld Affected before 0.22.0 Fixed in 0.22.0 Patch available CNA
github.com/ipld/go-ipld-prime (Go) Vendor— Affected before 0.22.0 Fixed in 0.22.0 Patch available GHSA-378j-3jfj-8r9f

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:protocol:go-ipld-prime::::::go::*	before 0.22.0	Vulnerable	Protocol

cpe:2.3:a:protocol:go-ipld-prime:*:*:*:*:*:go:*:* Versions before 0.22.0 Vulnerable ·Protocol

Remediation

Fix · CNA go-ipld-prime (ipld) Fixed in 0.22.0
Fix · GHSA-378j-3jfj-8r9f github.com/ipld/go-ipld-prime (Go) Fixed in 0.22.0 Advisory →

Timeline

2026-10-02 Threatist record created from CVE-2026-35480
2026-10-03 Alias added: GHSA-378j-3jfj-8r9f

References

Advisory 2

Other 3

TI-2026-30634 go-ipld-prime: DAG-CBOR and DAG-JSON decoders unbounded recursion depth CVSS 3.1MEDIUM 6.2

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences