{"id":"CVE-2023-23626","aliases":["GHSA-2h6c-j3gf-xp9r","GO-2023-1558"],"title":"IPFS go-bitfield vulnerable to DoS via malformed size arguments","summary":"IPFS go-bitfield vulnerable to DoS via malformed size arguments","severity":"medium","cvss":5.9,"cvssVector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H","vendor":"ipfs","product":"github.com/ipfs/go-bitfield","ecosystem":"go","affected":["github.com/ipfs/go-bitfield < 1.1.0"],"patched":["github.com/ipfs/go-bitfield 1.1.0"],"published":"2023-02-10","updated":"2026-09-10","sourceUpdated":"2026-09-10T03:49:51.750951929Z","source":"OSV","sourceUrl":"https://osv.dev/vulnerability/GHSA-2h6c-j3gf-xp9r","references":[{"url":"https://github.com/ipfs/go-bitfield/security/advisories/GHSA-2h6c-j3gf-xp9r"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2023-23626"},{"url":"https://github.com/ipfs/go-bitfield/commit/5e1d256fe043fc4163343ccca83862c69c52e579"},{"url":"https://github.com/ipfs/go-bitfield"},{"url":"https://pkg.go.dev/vuln/GO-2023-1558"}],"tags":["osv","go"],"epss":0.0091,"epssPercentile":0.58459,"ingestedAt":"2026-09-12T03:13:01.745Z","slug":"CVE-2023-23626","body":"## Overview\n\n### Impact\nWhen feeding untrusted user input into the size parameter of `NewBitfield` and `FromBytes` functions, an attacker can trigger `panic`s.\n\nThis happen when the `size` is a not a multiple of `8` or is negative.\nThere were already a note in the `NewBitfield` documentation:\n> ```\n> Panics if size is not a multiple of 8.\n> ````\n\nBut it incomplete and missing from `FromBytes`'s documentation.\n\nThis has been replaced by returning an `(Bitfield, error)` and returning a non nil error if the size is wrong.\n\n### Patches\n- https://github.com/ipfs/go-bitfield/commit/5e1d256fe043fc4163343ccca83862c69c52e579\n\n### Workarounds\n- Ensure `size%8 == 0 && size >= 0` yourself before calling `NewBitfield` or `FromBytes`\n\n### References\n- https://github.com/ipfs/go-unixfs/security/advisories/GHSA-q264-w97q-q778\n\n\n## Affected packages\n\n- `github.com/ipfs/go-bitfield < 1.1.0`\n\n## Remediation\n\nUpgrade to a patched release:\n\n- `github.com/ipfs/go-bitfield 1.1.0`","depth":"sunlit","depthScore":33,"depthScoreParts":{"impact":32.5,"likelihood":0.2,"exploitation":0,"ransomware":0},"changes":[]}