{"items":[{"id":"NVI-00017805","kind":"vulnerability","title":"Scriban: ExpressionDepthLimit guard is non-enforcing — parser-recursion DoS in 6.6.0–7.2.0 (incomplete fix for GHSA-wgh7-7m3c-fx25 / GHSA-p6q4-fgr8-vx4p)","revision":1,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-6q7j-xr26-3h2c"],"plain_summary":"GitHub lists this reviewed advisory for Scriban, Scriban.Signed. 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-6a330daee5efeb8fa22e3f17fb0c542a"],"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-6a330daee5efeb8fa22e3f17fb0c542a","url":"https://github.com/advisories/GHSA-6q7j-xr26-3h2c","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-6q7j-xr26-3h2c","publisher":"GitHub Advisory Database","observed_at":"2026-11-05T03:47:11.081Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-6a330daee5efeb8fa22e3f17fb0c542a"],"technology":"Scriban","known_exclusions":[],"conditions_summary":"### Summary\n\nThe `ExpressionDepthLimit` parser guard in Scriban does not actually stop parsing — it only logs a non-fatal error and lets recursive descent continue. As a result, a template containing a deeply nested expression (parentheses, array initializers, object initializers, or unary operators) drives the recursive-descent parser into a native stack overflow. The resulting `StackOverflowException` is **uncatchable** in .NET and **immediately terminates the host process**.\n\nAny application that parses an attacker-influenced template — or that passes attacker-controlled strings to `object.eval` / `object.eval_template` — can be crashed by a single small request (roughly an 8 KB payload). This is a denial-of-service. It affects both Scriban-native (`Template.Parse`) and Liquid (`Template.ParseLiquid`) syntax modes, which share the same expression parser.\n\nThis re-opens two advisories that were reported as fixed: **GHSA-wgh7-7m3c-fx25** (\"Uncontrolled recursion in parser → StackOverflow\", reported fixed in 6.6.0) and **GHSA-p6q4-fgr8-vx4p** (\"StackOverflow via nested array initializers bypasses ExpressionDepthLimit\", reported fixed in 7.0.0). Both fixes are incomplete: the limit ","public_affected_ranges":[">= 6.6.0, <= 7.2.0"]},{"certainty":"source_listed","source_ids":["sr-6a330daee5efeb8fa22e3f17fb0c542a"],"technology":"Scriban.Signed","known_exclusions":[],"conditions_summary":"### Summary\n\nThe `ExpressionDepthLimit` parser guard in Scriban does not actually stop parsing — it only logs a non-fatal error and lets recursive descent continue. As a result, a template containing a deeply nested expression (parentheses, array initializers, object initializers, or unary operators) drives the recursive-descent parser into a native stack overflow. The resulting `StackOverflowException` is **uncatchable** in .NET and **immediately terminates the host process**.\n\nAny application that parses an attacker-influenced template — or that passes attacker-controlled strings to `object.eval` / `object.eval_template` — can be crashed by a single small request (roughly an 8 KB payload). This is a denial-of-service. It affects both Scriban-native (`Template.Parse`) and Liquid (`Template.ParseLiquid`) syntax modes, which share the same expression parser.\n\nThis re-opens two advisories that were reported as fixed: **GHSA-wgh7-7m3c-fx25** (\"Uncontrolled recursion in parser → StackOverflow\", reported fixed in 6.6.0) and **GHSA-p6q4-fgr8-vx4p** (\"StackOverflow via nested array initializers bypasses ExpressionDepthLimit\", reported fixed in 7.0.0). Both fixes are incomplete: the limit ","public_affected_ranges":[">= 6.6.0, <= 7.2.0"]}],"null_published_at":"2026-11-05T19:10:21.470Z","source_updated_at":"2026-07-06T13:10:56.000Z","source_disclosed_at":"2026-06-26T21:02:14.000Z","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":"2026-11-05T03:47:11.081Z"}],"next_cursor":null,"snapshot_revision":"42594"}