CVE Explorer
CVE-2026-32284
The msgpack decoder fails to properly validate the input buffer length when processing truncated fixext data (format codes 0xd4-0xd8). This can lead to an out-of-bounds read and a runtime panic, allowing a denial of service attack.
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
1
Preserved source conflicts
No provider value was silently selected as the winner.
affected · 3 assertions
{"collectionURL":"https://pkg.go.dev","defaultStatus":"affected","packageName":"github.com/shamaton/msgpack","product":"github.com/shamaton/msgpack","programRoutines":[{"name":"Unmarshal"},{"name":"UnmarshalAsMap"},{"name":"UnmarshalAsArray"},{"name":"DecodeStructAsArray"},{"name":"DecodeStructAsMap"}],"vendor":"github.com/shamaton/msgpack"}
- cve_program_cvelist_v5affectedurn:baitaphish:normalized-source-record:v2:738d4e17433c342683f9455e7666ad918f404d57f53757189148c0a6adebc264 · sha256:e73673a7e5456eb0… · /containers/cna/affected/0
{"collectionURL":"https://pkg.go.dev","defaultStatus":"affected","packageName":"github.com/shamaton/msgpack/v3","product":"github.com/shamaton/msgpack/v3","programRoutines":[{"name":"Unmarshal"},{"name":"UnmarshalAsMap"},{"name":"UnmarshalAsArray"}],"vendor":"github.com/shamaton/msgpack/v3"}
- cve_program_cvelist_v5affectedurn:baitaphish:normalized-source-record:v2:738d4e17433c342683f9455e7666ad918f404d57f53757189148c0a6adebc264 · sha256:e73673a7e5456eb0… · /containers/cna/affected/2
{"collectionURL":"https://pkg.go.dev","defaultStatus":"affected","packageName":"github.com/shamaton/msgpack/v2","product":"github.com/shamaton/msgpack/v2","programRoutines":[{"name":"Unmarshal"},{"name":"UnmarshalAsMap"},{"name":"UnmarshalAsArray"}],"vendor":"github.com/shamaton/msgpack/v2"}
- cve_program_cvelist_v5affectedurn:baitaphish:normalized-source-record:v2:738d4e17433c342683f9455e7666ad918f404d57f53757189148c0a6adebc264 · sha256:e73673a7e5456eb0… · /containers/cna/affected/1
Affected products and versions
3 source assertions{"collectionURL":"https://pkg.go.dev","defaultStatus":"affected","packageName":"github.com/shamaton/msgpack","product":"github.com/shamaton/msgpack","programRoutines":[{"name":"Unmarshal"},{"name":"UnmarshalAsMap"},{"name":"UnmarshalAsArray"},{"name":"DecodeStructAsArray"},{"name":"DecodeStructAsMap"}],"vendor":"github.com/shamaton/msgpack"}
- cve_program_cvelist_v5affectedurn:baitaphish:normalized-source-record:v2:738d4e17433c342683f9455e7666ad918f404d57f53757189148c0a6adebc264 · sha256:e73673a7e5456eb0… · /containers/cna/affected/0
{"collectionURL":"https://pkg.go.dev","defaultStatus":"affected","packageName":"github.com/shamaton/msgpack/v3","product":"github.com/shamaton/msgpack/v3","programRoutines":[{"name":"Unmarshal"},{"name":"UnmarshalAsMap"},{"name":"UnmarshalAsArray"}],"vendor":"github.com/shamaton/msgpack/v3"}
- cve_program_cvelist_v5affectedurn:baitaphish:normalized-source-record:v2:738d4e17433c342683f9455e7666ad918f404d57f53757189148c0a6adebc264 · sha256:e73673a7e5456eb0… · /containers/cna/affected/2
{"collectionURL":"https://pkg.go.dev","defaultStatus":"affected","packageName":"github.com/shamaton/msgpack/v2","product":"github.com/shamaton/msgpack/v2","programRoutines":[{"name":"Unmarshal"},{"name":"UnmarshalAsMap"},{"name":"UnmarshalAsArray"}],"vendor":"github.com/shamaton/msgpack/v2"}
- cve_program_cvelist_v5affectedurn:baitaphish:normalized-source-record:v2:738d4e17433c342683f9455e7666ad918f404d57f53757189148c0a6adebc264 · sha256:e73673a7e5456eb0… · /containers/cna/affected/1
Provider-owned CVSS observations
1 source assertion{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":7.5,"baseSeverity":"HIGH","confidentialityImpact":"NONE","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","version":"3.1"},"metric_type":"cvssV3_1"}
- cve_program_cvelist_v5cvssurn:baitaphish:normalized-source-record:v2:738d4e17433c342683f9455e7666ad918f404d57f53757189148c0a6adebc264 · sha256:e73673a7e5456eb0… · /containers/adp/0/metrics/0/cvssV3_1
CWE assertions
1 source assertion{"description":"CWE-125: Out-of-bounds Read","lang":"en"}
- cve_program_cvelist_v5cweurn:baitaphish:normalized-source-record:v2:738d4e17433c342683f9455e7666ad918f404d57f53757189148c0a6adebc264 · sha256:e73673a7e5456eb0… · /containers/cna/problemTypes/0/descriptions/0
Source references
4 source assertions{"url":"https://github.com/golang/vulndb/issues/4513"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:738d4e17433c342683f9455e7666ad918f404d57f53757189148c0a6adebc264 · sha256:e73673a7e5456eb0… · /containers/cna/references/1
{"url":"https://github.com/shamaton/msgpack/issues/59"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:738d4e17433c342683f9455e7666ad918f404d57f53757189148c0a6adebc264 · sha256:e73673a7e5456eb0… · /containers/cna/references/0
{"url":"https://pkg.go.dev/vuln/GO-2026-4513"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:738d4e17433c342683f9455e7666ad918f404d57f53757189148c0a6adebc264 · sha256:e73673a7e5456eb0… · /containers/cna/references/2
{"tags":["exploit"],"url":"https://securityinfinity.com/research/shamaton-msgpack-oob-panic-fixext-dos-2026"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:738d4e17433c342683f9455e7666ad918f404d57f53757189148c0a6adebc264 · sha256:e73673a7e5456eb0… · /containers/adp/0/references/0
Attribution and limitations
- CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →
Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.