The $_internalConvertBucketIndexStats stage used PauseExecution as a way to signal "skip this document" when an index stats conversion failed. But PauseExecution is not a general purpose skip mechanism, but rather a TeeBuffer-internal signal used solely by $facet to coordinate its sub-pipelines. When this stage is placed before $facet in a pipeline, TeeBuffer receives the unexpected PauseExecution from upstream and hits a hard invariant assertion, crashing mongod.
{
"unresolved_ranges": [
{
"source": "AFFECTED_FIELD",
"extracted_events": [
{
"introduced": "8.3.0"
},
{
"fixed": "8.3.3"
},
{
"introduced": "8.2.0"
},
{
"fixed": "8.2.10"
},
{
"introduced": "8.0.0"
},
{
"fixed": "8.0.10"
},
{
"introduced": "7.0.0"
},
{
"fixed": "7.0.35"
}
]
}
],
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/9xxx/CVE-2026-9748.json",
"cna_assigner": "mongodb",
"cwe_ids": [
"CWE-617"
]
}{
"source": "CPE_RANGE",
"cpe": "cpe:2.3:a:mongodb:mongodb:*:*:*:*:*:*:*:*",
"extracted_events": [
{
"introduced": "7.0.0"
},
{
"fixed": "7.0.35"
},
{
"introduced": "8.0.0"
},
{
"fixed": "8.0.10"
},
{
"introduced": "8.2.0"
},
{
"fixed": "8.2.10"
},
{
"introduced": "8.3.0"
},
{
"fixed": "8.3.3"
}
]
}