CVE-2022-23495

go-merkledag implements the 'DAGService' interface and adds two ipld node types, Protobuf and Raw for the ipfs project. A `ProtoNode` may be modified in such a way as to cause various encode errors which will trigger a panic on common method calls that don't allow for error returns. A `ProtoNode` should only be able to encode to valid DAG-PB, attempting to encode invalid DAG-PB forms will result in an error from the codec. Manipulation of an existing (newly created or decoded) `ProtoNode` using the modifier methods did not account for certain states that would place the `ProtoNode` into an unencodeable form. Due to conformance with the [`github.com/ipfs/go-block-format#Block`](https://pkg.go.dev/github.com/ipfs/go-block-format#Block) and [`github.com/ipfs/go-ipld-format#Node`](https://pkg.go.dev/github.com/ipfs/go-ipld-format#Node) interfaces, certain methods, which internally require a re-encode if state has changed, will panic due to the inability to return an error. This issue has been addressed across a number of pull requests. Users are advised to upgrade to version 0.8.1 for a complete set of fixes. Users unable to upgrade may attempt to mitigate this issue by sanitising inputs when allowing user-input to set a new `CidBuilder` on a `ProtoNode` and by sanitising `Tsize` (`Link#Size`) values such that they are a reasonable byte-size for sub-DAGs where derived from user-input.

• CWE-755
• CWE-252

• https://en.wikipedia.org/wiki/Directed_acyclic_graphTechnical Description, Third Party Advisory
• https://github.com/ipfs/go-merkledag/issues/90Patch, Third Party Advisory
• https://github.com/ipfs/go-merkledag/pull/91Patch, Third Party Advisory
• https://github.com/ipfs/go-merkledag/pull/92Patch, Third Party Advisory
• https://github.com/ipfs/go-merkledag/pull/93Patch, Third Party Advisory
• https://github.com/ipfs/go-merkledag/releases/tag/v0.8.0Release Notes, Third Party Advisory
• https://github.com/ipfs/go-merkledag/releases/tag/v0.8.1Release Notes, Third Party Advisory
• https://github.com/ipfs/go-merkledag/security/advisories/GHSA-x39j-h85h-3f46Third Party Advisory
• https://github.com/ipfs/kubo/issues/9297Patch, Third Party Advisory
• https://en.wikipedia.org/wiki/Directed_acyclic_graphTechnical Description, Third Party Advisory
• https://github.com/ipfs/go-merkledag/issues/90Patch, Third Party Advisory
• https://github.com/ipfs/go-merkledag/pull/91Patch, Third Party Advisory
• https://github.com/ipfs/go-merkledag/pull/92Patch, Third Party Advisory
• https://github.com/ipfs/go-merkledag/pull/93Patch, Third Party Advisory
• https://github.com/ipfs/go-merkledag/releases/tag/v0.8.0Release Notes, Third Party Advisory
• https://github.com/ipfs/go-merkledag/releases/tag/v0.8.1Release Notes, Third Party Advisory
• https://github.com/ipfs/go-merkledag/security/advisories/GHSA-x39j-h85h-3f46Third Party Advisory
• https://github.com/ipfs/kubo/issues/9297Patch, Third Party Advisory

Published

Dec 8, 2022

Last Modified

Jun 17, 2026

Status

Modified

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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