Answer in brief
CVE-2026-85078 records a Medium severity (CVSS 6.5) vulnerability in sanic chunked trailer request smuggling allows hidden second request execution. The current sources do not mark it as known exploited. The current feed maps sanic-org/sanic (generic), sanic (pip), sanic (pip). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 6.5. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps sanic-org/sanic (generic), sanic (pip), sanic (pip). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| sanic-org/sanicgeneric | < 24.12.1 || >= 25.12.0, < 25.12.1 | Not reported |
| sanicpip | <24.12.1 | 24.12.1 |
| sanicpip | >=25.12.0,<25.12.1 | 25.12.1 |
Published upstream
Sep 17, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Sep 17, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Sep 17, 2026
Sanic is an opensource python web server/framework. In version 25.12.0, Sanic's core HTTP/1.1 chunked-body handling does not fully consume the trailer-part after the terminating zero chunk before reusing the keep-alive connection buffer. A remote unauthenticated client can place attacker-controlled bytes in that trailer region, causing Sanic to parse and route them as a hidden second request after the outer request. This breaks HTTP request-boundary integrity and can provide a request-smuggling primitive when Sanic is deployed behind intermediaries. This issue is fixed in version 25.12.1.
Quoted source text, attributed separately from HOL analysis.