{"items":[{"id":"NVI-00003085","kind":"vulnerability","title":"symfony/translation XML Entity Expansion vulnerability","revision":1,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-f75p-x5vm-83qp"],"plain_summary":"OSV carries this publisher advisory for symfony/translation. This is an aggregated source copy; consult the original publisher and compare update dates.","review_status":"source_listed","control_topics":[],"public_actions":[{"summary":"The original advisory lists fixed boundaries 2.0.17 for symfony/translation. Confirm the publisher’s latest guidance.","source_ids":["sr-32307b891a0dd884faae03976193abd9"],"action_type":"vendor_patch","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-32307b891a0dd884faae03976193abd9","url":"https://github.com/advisories/GHSA-f75p-x5vm-83qp","basis":"vendor_advisory","notes":"GitHub-origin advisory, CC-BY-4.0; OSV is an aggregate copy, not independent corroboration.","title":"GHSA-f75p-x5vm-83qp","publisher":"GitHub Advisory Database via OSV","observed_at":"2026-10-31T21:42:10.710Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-32307b891a0dd884faae03976193abd9"],"technology":"symfony/translation","known_exclusions":[],"conditions_summary":"Symfony 2.0.11 carried a [similar] XXE security fix, however, on review of ZF2 I also noted a vulnerability to XML Entity Expansion (XEE) attacks whereby all extensions making use of libxml2 have no defense against XEE Quadratic Blowup Attacks. The vulnerability is a function of there being no current method of disabling custom entities in PHP (i.e. defined internal to the XML document without using external entities). In a QBA, a long entity can be defined and then referred to multiple times in document elements, creating a memory sink with which Denial Of Service attacks against a host's RAM can be mounted. The use of the LIBXML_NOENT or equivalent option in a dependent extension amplified the impact (it doesn't actually mean \"No Entities\"). In addition, libxml2's innate defense against the related Exponential or Billion Laugh's XEE attacks is active only so long as the LIBXML_PARSEHUGE is NOT set (it disables libxml2's hardcoded entity recursion limit). No instances of these two options were noted, but it's worth referencing for the future.\n\nConsider this (non-fatal) example:\n```\n\n<!DOCTYPE data [<!ENTITY a\n\"aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa","public_affected_ranges":["ECOSYSTEM: introduced 2.0.0; fixed 2.0.17"]}],"null_published_at":"2026-10-31T22:12:38.474Z","source_updated_at":"2024-12-05T05:42:44.053Z","source_disclosed_at":"2024-05-30T13:02:41.000Z","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":"2026-10-31T21:42:10.710Z"}],"next_cursor":null,"snapshot_revision":"42594"}