{"items":[{"id":"NVI-00009064","kind":"vulnerability","title":"MongoDB Python Driver: Out-of-bounds read in BSON decoding via a malformed Regex element","revision":4,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected.","NVD lastModified does not establish freshness of every associated CPE record."],"lifecycle":"active","identifiers":["GHSA-98qm-wvgf-w4cf","CVE-2026-106435"],"plain_summary":"GitHub lists this reviewed advisory for pymongo. Published version ranges and source prerequisites are shown below; this is not an inspection of a visitor’s application.","review_status":"source_listed","control_topics":[],"public_actions":[{"summary":"Identify the exact component and deployed version, examine the linked publisher’s conditions, and retain evidence of any mitigation.","source_ids":["sr-011eb33520283cee125ddd28e1210fb3"],"action_type":"investigate","limitations":"Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system.","current_supported_target":null}],"schema_version":"1.1.0","source_metrics":[{"kind":"CVSS","as_of":"2026-10-15T17:00:36.980Z","value":"5.1 MEDIUM (3.1)","meaning":"cna@mongodb.com severity; no combined Null risk score.","source_id":"sr-3b0a0d482d7cddbc13a6a2493f0c02c5"},{"kind":"CVSS","as_of":"2026-10-15T17:00:36.980Z","value":"4.7 MEDIUM (3.1)","meaning":"nvd@nist.gov severity; no combined Null risk score.","source_id":"sr-3b0a0d482d7cddbc13a6a2493f0c02c5"},{"kind":"CVSS","as_of":"2026-10-15T17:00:36.980Z","value":"5.9 MEDIUM (4.0)","meaning":"cna@mongodb.com severity; no combined Null risk score.","source_id":"sr-3b0a0d482d7cddbc13a6a2493f0c02c5"},{"kind":"EPSS","as_of":"2026-11-03T12:00:27.000Z","value":"0.094%","meaning":"FIRST EPSS model v2026.06.15; exploitation probability over 30 days, percentile 0.00561. Missing scores are unknown.","source_id":"sr-011eb33520283cee125ddd28e1210fb3"}],"why_it_matters":"Published affected context helps an owner decide what evidence to gather. This report has not examined your application.","related_sources":[{"id":"sr-98629695e844f53d31d85ee3c600d3cf","url":"https://github.com/advisories/GHSA-98qm-wvgf-w4cf","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-98qm-wvgf-w4cf","publisher":"GitHub Advisory Database","observed_at":"2026-10-31T21:56:51.534Z"},{"id":"sr-3b0a0d482d7cddbc13a6a2493f0c02c5","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-106435","basis":"official_catalog","notes":"This product uses data from the NVD API but is not endorsed or certified by the NVD.","title":"CVE-2026-106435","publisher":"NIST National Vulnerability Database","observed_at":"2026-11-03T09:58:21.903Z"},{"id":"sr-011eb33520283cee125ddd28e1210fb3","url":"https://www.first.org/epss/data.html","basis":"official_catalog","notes":"FIRST EPSS; probability of exploitation in the next 30 days, not local compromise. Dataset date/model retained; FIRST services terms apply.","title":"CVE-2026-106435","publisher":"FIRST EPSS","observed_at":"2026-11-03T17:44:07.774Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-98629695e844f53d31d85ee3c600d3cf"],"technology":"pymongo","known_exclusions":[],"conditions_summary":"### Impact\nThe C extension's BSON decoder scans a Regex element's pattern and flags strings with strlen before checking the document's remaining length, so a crafted truncated Regex element can read past the end of the caller's buffer. bson.decode and bson.decode_all accept mmap and array buffers, which carry no NUL sentinel; the read can cross into unmapped memory and kill the process with an uncatchable SIGSEGV. Any application decoding untrusted BSON from such buffers is affected — impact is availability only, since the out-of-bounds bytes are never returned as content. NUL-terminated buffers (bytes, bytearray) raise `InvalidBSON` at worst; the driver's own transport and pure-Python installs are not affected. All releases through 4.18.2 are affected when the C extension is loaded.\n\n### Patches\nFixed in PyMongo 4.18.3. Malformed Regex elements now raise InvalidBSON on every accepted buffer type; valid documents decode unchanged.\n\n###  Workarounds\nDecode untrusted BSON only from NUL-terminated buffers — bytes or bytearray — and copy mmap input first, e.g. bytes(mm[:size]).","public_affected_ranges":[">= 3.9.0, <= 4.18.2"]}],"null_published_at":"2026-11-04T10:04:41.530Z","source_updated_at":"2026-10-27T15:36:37.000Z","source_disclosed_at":"2026-10-27T15:36:35.000Z","is_synthetic_fixture":false,"null_last_reviewed_at":null,"public_change_summary":"Dated EPSS estimate updated; this is not a new disclosure or proof of exploitation.","null_first_observed_at":"2026-10-31T21:56:51.534Z"},{"id":"NVI-00009064","kind":"vulnerability","title":"MongoDB Python Driver: Out-of-bounds read in BSON decoding via a malformed Regex element","revision":2,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-98qm-wvgf-w4cf","CVE-2026-106435"],"plain_summary":"GitHub lists this reviewed advisory for pymongo. Published version ranges and source prerequisites are shown below; this is not an inspection of a visitor’s application.","review_status":"source_listed","control_topics":[],"public_actions":[{"summary":"Identify the exact component and deployed version, examine the linked publisher’s conditions, and retain evidence of any mitigation.","source_ids":["sr-130668abcf88b2d3eb3a4531cc9b622a"],"action_type":"investigate","limitations":"Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system.","current_supported_target":null}],"schema_version":"1.1.0","source_metrics":[{"kind":"EPSS","as_of":"2026-11-01T12:00:16.000Z","value":"0.094%","meaning":"FIRST EPSS model v2026.06.15; exploitation probability over 30 days, percentile 0.00559. Missing scores are unknown.","source_id":"sr-130668abcf88b2d3eb3a4531cc9b622a"}],"why_it_matters":"Published affected context helps an owner decide what evidence to gather. This report has not examined your application.","related_sources":[{"id":"sr-98629695e844f53d31d85ee3c600d3cf","url":"https://github.com/advisories/GHSA-98qm-wvgf-w4cf","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-98qm-wvgf-w4cf","publisher":"GitHub Advisory Database","observed_at":"2026-10-31T21:56:51.534Z"},{"id":"sr-130668abcf88b2d3eb3a4531cc9b622a","url":"https://www.first.org/epss/data.html","basis":"official_catalog","notes":"FIRST EPSS; probability of exploitation in the next 30 days, not local compromise. Dataset date/model retained; FIRST services terms apply.","title":"CVE-2026-106435","publisher":"FIRST EPSS","observed_at":"2026-11-01T14:28:32.263Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-98629695e844f53d31d85ee3c600d3cf"],"technology":"pymongo","known_exclusions":[],"conditions_summary":"### Impact\nThe C extension's BSON decoder scans a Regex element's pattern and flags strings with strlen before checking the document's remaining length, so a crafted truncated Regex element can read past the end of the caller's buffer. bson.decode and bson.decode_all accept mmap and array buffers, which carry no NUL sentinel; the read can cross into unmapped memory and kill the process with an uncatchable SIGSEGV. Any application decoding untrusted BSON from such buffers is affected — impact is availability only, since the out-of-bounds bytes are never returned as content. NUL-terminated buffers (bytes, bytearray) raise `InvalidBSON` at worst; the driver's own transport and pure-Python installs are not affected. All releases through 4.18.2 are affected when the C extension is loaded.\n\n### Patches\nFixed in PyMongo 4.18.3. Malformed Regex elements now raise InvalidBSON on every accepted buffer type; valid documents decode unchanged.\n\n###  Workarounds\nDecode untrusted BSON only from NUL-terminated buffers — bytes or bytearray — and copy mmap input first, e.g. bytes(mm[:size]).","public_affected_ranges":[">= 3.9.0, <= 4.18.2"]}],"null_published_at":"2026-11-03T17:49:18.477Z","source_updated_at":"2026-10-27T15:36:37.000Z","source_disclosed_at":"2026-10-27T15:36:35.000Z","is_synthetic_fixture":false,"null_last_reviewed_at":null,"public_change_summary":"Dated EPSS estimate updated; this is not a new disclosure or proof of exploitation.","null_first_observed_at":"2026-10-31T21:56:51.534Z"},{"id":"NVI-00009064","kind":"vulnerability","title":"MongoDB Python Driver: Out-of-bounds read in BSON decoding via a malformed Regex element","revision":1,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-98qm-wvgf-w4cf","CVE-2026-106435"],"plain_summary":"GitHub lists this reviewed advisory for pymongo. Published version ranges and source prerequisites are shown below; this is not an inspection of a visitor’s application.","review_status":"source_listed","control_topics":[],"public_actions":[{"summary":"Identify the exact component and deployed version, examine the linked publisher’s conditions, and retain evidence of any mitigation.","source_ids":["sr-98629695e844f53d31d85ee3c600d3cf"],"action_type":"investigate","limitations":"Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system.","current_supported_target":null}],"schema_version":"1.1.0","source_metrics":[],"why_it_matters":"Published affected context helps an owner decide what evidence to gather. This report has not examined your application.","related_sources":[{"id":"sr-98629695e844f53d31d85ee3c600d3cf","url":"https://github.com/advisories/GHSA-98qm-wvgf-w4cf","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-98qm-wvgf-w4cf","publisher":"GitHub Advisory Database","observed_at":"2026-10-31T21:56:51.534Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-98629695e844f53d31d85ee3c600d3cf"],"technology":"pymongo","known_exclusions":[],"conditions_summary":"### Impact\nThe C extension's BSON decoder scans a Regex element's pattern and flags strings with strlen before checking the document's remaining length, so a crafted truncated Regex element can read past the end of the caller's buffer. bson.decode and bson.decode_all accept mmap and array buffers, which carry no NUL sentinel; the read can cross into unmapped memory and kill the process with an uncatchable SIGSEGV. Any application decoding untrusted BSON from such buffers is affected — impact is availability only, since the out-of-bounds bytes are never returned as content. NUL-terminated buffers (bytes, bytearray) raise `InvalidBSON` at worst; the driver's own transport and pure-Python installs are not affected. All releases through 4.18.2 are affected when the C extension is loaded.\n\n### Patches\nFixed in PyMongo 4.18.3. Malformed Regex elements now raise InvalidBSON on every accepted buffer type; valid documents decode unchanged.\n\n###  Workarounds\nDecode untrusted BSON only from NUL-terminated buffers — bytes or bytearray — and copy mmap input first, e.g. bytes(mm[:size]).","public_affected_ranges":[">= 3.9.0, <= 4.18.2"]}],"null_published_at":"2026-10-31T22:13:31.272Z","source_updated_at":"2026-10-27T15:36:37.000Z","source_disclosed_at":"2026-10-27T15:36:35.000Z","is_synthetic_fixture":false,"null_last_reviewed_at":null,"public_change_summary":"First indexed by Null; source disclosure date is shown separately.","null_first_observed_at":"2026-10-31T21:56:51.534Z"}],"next_cursor":null,"snapshot_revision":"42594"}