{"items":[{"id":"NVI-00012942","kind":"vulnerability","title":"Angular SSR: XSS via Unescaped Processing Instruction () Nodes in Fallback Raw-Content Elements","revision":1,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-j3r3-mxqp-r2p4","CVE-2026-88058"],"plain_summary":"GitHub lists this reviewed advisory for @angular/platform-server, @angular/platform-server, @angular/platform-server, @angular/platform-server. 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-167b161bccacf9f6aaa062e0eda35979"],"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-167b161bccacf9f6aaa062e0eda35979","url":"https://github.com/advisories/GHSA-j3r3-mxqp-r2p4","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-j3r3-mxqp-r2p4","publisher":"GitHub Advisory Database","observed_at":"2026-11-01T07:24:25.558Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-167b161bccacf9f6aaa062e0eda35979"],"technology":"@angular/platform-server","known_exclusions":[],"conditions_summary":"### Summary\nAn XSS vulnerability exists in `@angular/platform-server` during server-side rendering (SSR) HTML serialization of `ProcessingInstruction` DOM nodes (``, `nodeType === 7`) when nested inside fallback raw-content elements (``, ``, ``, ``). While processing instruction data escaped `>` to `&gt;`, it did not check for or escape matching closing tags of ancestor fallback elements (e.g., ``). When rendered in a browser with scripting enabled, an unescaped closing tag sequence in a processing instruction prematurely closes the fallback raw-content tag and causes subsequent sibling elements to execute as live HTML.\n\n### Technical Description\nIn HTML5 parsing, fallback raw-content elements (``, ``, ``, ``) place the browser's HTML tokenizer into `RAWTEXT` mode. In `RAWTEXT` mode, processing instruction tokens (``) are treated as literal raw text rather than bogus comments, and the parser ignores `>` or `?>`. The only token sequence that terminates the container is an end tag matching the container tag name (`</noscript`, `</iframe`, etc.).\n\nDuring server-side HTML serializ","public_affected_ranges":[">= 22.0.0, < 22.1.4"]},{"certainty":"source_listed","source_ids":["sr-167b161bccacf9f6aaa062e0eda35979"],"technology":"@angular/platform-server","known_exclusions":[],"conditions_summary":"### Summary\nAn XSS vulnerability exists in `@angular/platform-server` during server-side rendering (SSR) HTML serialization of `ProcessingInstruction` DOM nodes (``, `nodeType === 7`) when nested inside fallback raw-content elements (``, ``, ``, ``). While processing instruction data escaped `>` to `&gt;`, it did not check for or escape matching closing tags of ancestor fallback elements (e.g., ``). When rendered in a browser with scripting enabled, an unescaped closing tag sequence in a processing instruction prematurely closes the fallback raw-content tag and causes subsequent sibling elements to execute as live HTML.\n\n### Technical Description\nIn HTML5 parsing, fallback raw-content elements (``, ``, ``, ``) place the browser's HTML tokenizer into `RAWTEXT` mode. In `RAWTEXT` mode, processing instruction tokens (``) are treated as literal raw text rather than bogus comments, and the parser ignores `>` or `?>`. The only token sequence that terminates the container is an end tag matching the container tag name (`</noscript`, `</iframe`, etc.).\n\nDuring server-side HTML serializ","public_affected_ranges":[">= 21.0.0, < 21.2.22"]},{"certainty":"source_listed","source_ids":["sr-167b161bccacf9f6aaa062e0eda35979"],"technology":"@angular/platform-server","known_exclusions":[],"conditions_summary":"### Summary\nAn XSS vulnerability exists in `@angular/platform-server` during server-side rendering (SSR) HTML serialization of `ProcessingInstruction` DOM nodes (``, `nodeType === 7`) when nested inside fallback raw-content elements (``, ``, ``, ``). While processing instruction data escaped `>` to `&gt;`, it did not check for or escape matching closing tags of ancestor fallback elements (e.g., ``). When rendered in a browser with scripting enabled, an unescaped closing tag sequence in a processing instruction prematurely closes the fallback raw-content tag and causes subsequent sibling elements to execute as live HTML.\n\n### Technical Description\nIn HTML5 parsing, fallback raw-content elements (``, ``, ``, ``) place the browser's HTML tokenizer into `RAWTEXT` mode. In `RAWTEXT` mode, processing instruction tokens (``) are treated as literal raw text rather than bogus comments, and the parser ignores `>` or `?>`. The only token sequence that terminates the container is an end tag matching the container tag name (`</noscript`, `</iframe`, etc.).\n\nDuring server-side HTML serializ","public_affected_ranges":[">= 20.0.0, < 20.3.30"]},{"certainty":"source_listed","source_ids":["sr-167b161bccacf9f6aaa062e0eda35979"],"technology":"@angular/platform-server","known_exclusions":[],"conditions_summary":"### Summary\nAn XSS vulnerability exists in `@angular/platform-server` during server-side rendering (SSR) HTML serialization of `ProcessingInstruction` DOM nodes (``, `nodeType === 7`) when nested inside fallback raw-content elements (``, ``, ``, ``). While processing instruction data escaped `>` to `&gt;`, it did not check for or escape matching closing tags of ancestor fallback elements (e.g., ``). When rendered in a browser with scripting enabled, an unescaped closing tag sequence in a processing instruction prematurely closes the fallback raw-content tag and causes subsequent sibling elements to execute as live HTML.\n\n### Technical Description\nIn HTML5 parsing, fallback raw-content elements (``, ``, ``, ``) place the browser's HTML tokenizer into `RAWTEXT` mode. In `RAWTEXT` mode, processing instruction tokens (``) are treated as literal raw text rather than bogus comments, and the parser ignores `>` or `?>`. The only token sequence that terminates the container is an end tag matching the container tag name (`</noscript`, `</iframe`, etc.).\n\nDuring server-side HTML serializ","public_affected_ranges":["<= 19.2.25"]}],"null_published_at":"2026-11-01T07:29:12.903Z","source_updated_at":"2026-09-28T20:40:09.000Z","source_disclosed_at":"2026-09-28T20:39:26.000Z","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"}