{"items":[{"id":"NVI-00012929","kind":"vulnerability","title":"urllib3: HTTPResponse.stream()/read_chunked() buffers an unbounded chunk-size line into memory","revision":1,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-vxq7-64xx-v4gw","CVE-2026-97689"],"plain_summary":"GitHub lists this reviewed advisory for urllib3. 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-1131340f716d0004f2c8bc739c212a2b"],"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-1131340f716d0004f2c8bc739c212a2b","url":"https://github.com/advisories/GHSA-vxq7-64xx-v4gw","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-vxq7-64xx-v4gw","publisher":"GitHub Advisory Database","observed_at":"2026-11-01T07:24:25.558Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-1131340f716d0004f2c8bc739c212a2b"],"technology":"urllib3","known_exclusions":[],"conditions_summary":"## Impact\n\nurllib3's streaming API is designed for efficiently handling large HTTP responses by reading the content in chunks, rather than loading the entire response body into memory at once. When decoding a chunked-transfer-encoded response, this API reads each chunk's size field by buffering until it sees `\\n` or EOF.\n\nA malicious HTTP server can return `Transfer-Encoding: chunked` and then send a very long run of bytes without any newline, causing the streaming client to buffer that entire run before urllib3 can reject the chunk size as invalid and allocate more memory than intended.\n\nTo fix the issue, we'll reject chunk-size fields larger than 65536 bytes, as already done in the non-streaming case, which is currently handled by the Python standard library. Note that this only applies to reading the chunk-size field, not the chunk data, which is already handled correctly. Thus, there shouldn't be any impact for non-malicious servers.\n\n## Affected usages\n\nApplications and libraries using urllib3 versions earlier than 2.8.0 may be affected whe","public_affected_ranges":[">= 1.10.3, < 2.8.0"]}],"null_published_at":"2026-11-01T07:29:12.903Z","source_updated_at":"2026-09-30T14:46:20.000Z","source_disclosed_at":"2026-09-30T14:46:18.000Z","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":"2026-11-01T07:24:25.558Z"}],"next_cursor":null,"snapshot_revision":"42594"}