{"items":[{"id":"NVI-00018487","kind":"vulnerability","title":"Dulwich has unbounded memory allocation in receive-pack from crafted thin packs","revision":1,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-xrvj-v92f-53gj","CVE-2026-47734"],"plain_summary":"GitHub lists this reviewed advisory for dulwich. 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-2eeba2d6604abf7b91150daabc5c04f6"],"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":"2026-06-11T14:07:19.000Z","value":"5.7 medium","meaning":"GitHub source severity; exploitability and local consequence require separate evidence.","source_id":"sr-2eeba2d6604abf7b91150daabc5c04f6"}],"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-2eeba2d6604abf7b91150daabc5c04f6","url":"https://github.com/advisories/GHSA-xrvj-v92f-53gj","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-xrvj-v92f-53gj","publisher":"GitHub Advisory Database","observed_at":"2026-11-06T15:13:13.153Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-2eeba2d6604abf7b91150daabc5c04f6"],"technology":"dulwich","known_exclusions":[],"conditions_summary":"## Impact\n\nAn uncontrolled-resource-consumption (memory exhaustion) denial-of-service vulnerability (CWE-400 / CWE-789).\n\nA client with push access could push a tiny crafted thin pack (~174 bytes)  whose delta header declares a huge   dest_size. When dulwich ingested it via  add_thin_pack / apply_delta, it would  allocate hundreds of MB of memory based on that attacker-controlled size, with no relationship to the actual bytes received.\n\nWho is impacted: Operators running a Dulwich-based Git server that exposes git-receive-pack (i.e. accepts pushes) -\nfor example via dulwich.server functionality, the HTTP  smart server, or anything built on ReceivePackHandler. \n\n## Patches\n\nPatched in 1.2.5.\n\nadd_thin_pack now accepts a max_input_size keyword (bytes; 0/None = unlimited, matching git's semantics), and ReceivePackHandler reads receive.maxInputSize from the repository config and passes it through. Wire reads are counted and a PackInputTooLarge exception is raised once the cap is exceeded - equivalent to git index-pack --max-input-size.\n\nUsers should upgrade to Dulwich 1.2.5 or later and set receive.maxInputSize in their server's repository config to a sane bound for their environment.\n","public_affected_ranges":[">= 0.1.0, < 1.2.5"]}],"null_published_at":"2026-11-07T07:07:39.841Z","source_updated_at":"2026-06-11T14:07:19.000Z","source_disclosed_at":"2026-06-08T23:43:42.000Z","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":"2026-11-06T15:13:13.153Z"}],"next_cursor":null,"snapshot_revision":"42594"}