{"items":[{"id":"NVI-00014985","kind":"vulnerability","title":"docx4j: Stack Overflow via Cyclic `w:basedOn` Style Chain leads to Denial of Service","revision":3,"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-gc95-3vw8-vg43","CVE-2026-53752"],"plain_summary":"GitHub lists this reviewed advisory for org.docx4j:docx4j-core. 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-13965b65ef1eb1916bc21b8449e4040c"],"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":"2026-08-17T21:55:50.000Z","value":"7.5 high","meaning":"GitHub source severity; exploitability and local consequence require separate evidence.","source_id":"sr-007296708f4e2b37d05c1dc58058e6f5"},{"kind":"CVSS","as_of":"2026-09-30T17:43:24.057Z","value":"7.5 HIGH (3.1)","meaning":"security-advisories@github.com severity; no combined Null risk score.","source_id":"sr-4947078f1808f477e6b25564962cafd7"},{"kind":"EPSS","as_of":"2026-11-03T12:00:27.000Z","value":"0.630%","meaning":"FIRST EPSS model v2026.06.15; exploitation probability over 30 days, percentile 0.5023. Missing scores are unknown.","source_id":"sr-13965b65ef1eb1916bc21b8449e4040c"}],"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-007296708f4e2b37d05c1dc58058e6f5","url":"https://github.com/advisories/GHSA-gc95-3vw8-vg43","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-gc95-3vw8-vg43","publisher":"GitHub Advisory Database","observed_at":"2026-11-02T20:15:44.568Z"},{"id":"sr-4947078f1808f477e6b25564962cafd7","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-53752","basis":"official_catalog","notes":"This product uses data from the NVD API but is not endorsed or certified by the NVD.","title":"CVE-2026-53752","publisher":"NIST National Vulnerability Database","observed_at":"2026-11-08T01:48:05.462Z"},{"id":"sr-13965b65ef1eb1916bc21b8449e4040c","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-2026-53752","publisher":"FIRST EPSS","observed_at":"2026-11-03T17:44:07.787Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-007296708f4e2b37d05c1dc58058e6f5"],"technology":"org.docx4j:docx4j-core","known_exclusions":[],"conditions_summary":"### Summary\ndocx4j's `PropertyResolver` and several adjacent helpers recursively walk the OpenXML style inheritance chain (`w:basedOn`) without cycle detection. \n\nA WordprocessingML document containing a cyclic style chain (for example, Style A based on B and Style B based on A) causes unbounded recursion and a `java.lang.StackOverflowError` within the property-resolution code path.\n\nThese helpers are used by operations that require effective style resolution, including common conversion and TOC-related paths.  As a result, most server-side pipelines that accept a user-supplied docx and process it through docx4j can likely be crashed by a file containing a cyclic style reference.\n\n### Details\n\nRepresentative snippet: `PropertyResolver.fillPPrStack`\n\n```java\nprivate void fillPPrStack(String styleId, Stack pPrStack) {\n    Style style = liveStyles.get(styleId);\n    ...\n    // if it is based on, recurse\n    if (style.getBasedOn() == null) {\n        log.debug(\"Style \" + styleId + \" is a root style.\");\n    } else if (style.getBasedOn().getVal() != null) {\n        String basedOnStyleName = style.getBasedOn().getVal();\n        fillPPrStack(basedOnStyleName, pPrStack);   // ← unbounded","public_affected_ranges":["<= 11.5.13"]}],"null_published_at":"2026-11-08T19:53:44.054Z","source_updated_at":"2026-08-17T21:55:50.000Z","source_disclosed_at":"2026-08-17T21:55:49.000Z","is_synthetic_fixture":false,"null_last_reviewed_at":null,"public_change_summary":"Source facts changed; compare the preserved prior revision.","null_first_observed_at":"2026-11-02T20:15:44.568Z"},{"id":"NVI-00014985","kind":"vulnerability","title":"docx4j: Stack Overflow via Cyclic `w:basedOn` Style Chain leads to Denial of Service","revision":2,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-gc95-3vw8-vg43","CVE-2026-53752"],"plain_summary":"GitHub lists this reviewed advisory for org.docx4j:docx4j-core. 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-13965b65ef1eb1916bc21b8449e4040c"],"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":"2026-08-17T21:55:50.000Z","value":"7.5 high","meaning":"GitHub source severity; exploitability and local consequence require separate evidence.","source_id":"sr-007296708f4e2b37d05c1dc58058e6f5"},{"kind":"EPSS","as_of":"2026-11-03T12:00:27.000Z","value":"0.630%","meaning":"FIRST EPSS model v2026.06.15; exploitation probability over 30 days, percentile 0.5023. Missing scores are unknown.","source_id":"sr-13965b65ef1eb1916bc21b8449e4040c"}],"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-007296708f4e2b37d05c1dc58058e6f5","url":"https://github.com/advisories/GHSA-gc95-3vw8-vg43","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-gc95-3vw8-vg43","publisher":"GitHub Advisory Database","observed_at":"2026-11-02T20:15:44.568Z"},{"id":"sr-13965b65ef1eb1916bc21b8449e4040c","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-2026-53752","publisher":"FIRST EPSS","observed_at":"2026-11-03T17:44:07.787Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-007296708f4e2b37d05c1dc58058e6f5"],"technology":"org.docx4j:docx4j-core","known_exclusions":[],"conditions_summary":"### Summary\ndocx4j's `PropertyResolver` and several adjacent helpers recursively walk the OpenXML style inheritance chain (`w:basedOn`) without cycle detection. \n\nA WordprocessingML document containing a cyclic style chain (for example, Style A based on B and Style B based on A) causes unbounded recursion and a `java.lang.StackOverflowError` within the property-resolution code path.\n\nThese helpers are used by operations that require effective style resolution, including common conversion and TOC-related paths.  As a result, most server-side pipelines that accept a user-supplied docx and process it through docx4j can likely be crashed by a file containing a cyclic style reference.\n\n### Details\n\nRepresentative snippet: `PropertyResolver.fillPPrStack`\n\n```java\nprivate void fillPPrStack(String styleId, Stack pPrStack) {\n    Style style = liveStyles.get(styleId);\n    ...\n    // if it is based on, recurse\n    if (style.getBasedOn() == null) {\n        log.debug(\"Style \" + styleId + \" is a root style.\");\n    } else if (style.getBasedOn().getVal() != null) {\n        String basedOnStyleName = style.getBasedOn().getVal();\n        fillPPrStack(basedOnStyleName, pPrStack);   // ← unbounded","public_affected_ranges":["<= 11.5.13"]}],"null_published_at":"2026-11-06T00:29:57.319Z","source_updated_at":"2026-08-17T21:55:50.000Z","source_disclosed_at":"2026-08-17T21:55:49.000Z","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":"2026-11-02T20:15:44.568Z"},{"id":"NVI-00014985","kind":"vulnerability","title":"docx4j: Stack Overflow via Cyclic `w:basedOn` Style Chain leads to Denial of Service","revision":1,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-gc95-3vw8-vg43","CVE-2026-53752"],"plain_summary":"GitHub lists this reviewed advisory for org.docx4j:docx4j-core. 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-007296708f4e2b37d05c1dc58058e6f5"],"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":"2026-08-17T21:55:50.000Z","value":"7.5 high","meaning":"GitHub source severity; exploitability and local consequence require separate evidence.","source_id":"sr-007296708f4e2b37d05c1dc58058e6f5"}],"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-007296708f4e2b37d05c1dc58058e6f5","url":"https://github.com/advisories/GHSA-gc95-3vw8-vg43","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-gc95-3vw8-vg43","publisher":"GitHub Advisory Database","observed_at":"2026-11-02T20:15:44.568Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-007296708f4e2b37d05c1dc58058e6f5"],"technology":"org.docx4j:docx4j-core","known_exclusions":[],"conditions_summary":"### Summary\ndocx4j's `PropertyResolver` and several adjacent helpers recursively walk the OpenXML style inheritance chain (`w:basedOn`) without cycle detection. \n\nA WordprocessingML document containing a cyclic style chain (for example, Style A based on B and Style B based on A) causes unbounded recursion and a `java.lang.StackOverflowError` within the property-resolution code path.\n\nThese helpers are used by operations that require effective style resolution, including common conversion and TOC-related paths.  As a result, most server-side pipelines that accept a user-supplied docx and process it through docx4j can likely be crashed by a file containing a cyclic style reference.\n\n### Details\n\nRepresentative snippet: `PropertyResolver.fillPPrStack`\n\n```java\nprivate void fillPPrStack(String styleId, Stack pPrStack) {\n    Style style = liveStyles.get(styleId);\n    ...\n    // if it is based on, recurse\n    if (style.getBasedOn() == null) {\n        log.debug(\"Style \" + styleId + \" is a root style.\");\n    } else if (style.getBasedOn().getVal() != null) {\n        String basedOnStyleName = style.getBasedOn().getVal();\n        fillPPrStack(basedOnStyleName, pPrStack);   // ← unbounded","public_affected_ranges":["<= 11.5.13"]}],"null_published_at":"2026-11-03T10:03:26.531Z","source_updated_at":"2026-08-17T21:55:50.000Z","source_disclosed_at":"2026-08-17T21:55:49.000Z","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":"2026-11-02T20:15:44.568Z"}],"next_cursor":null,"snapshot_revision":"42594"}