CVE-2026-85077
Sanic: HTTP response header injection via missing CR/LF validation in Sanic HTTP/1.1 responses
- Published
- Updated
- Reserved
- Assigned by
- GitHub_M
Description
Sanic is an opensource python web server/framework. Prior to version 24.12.1, and in version 25.12.0, the HTTP/1.1 response pipeline in sanic/response/types.py serializes response header names and values without rejecting carriage-return or line-feed characters. Applications that place attacker-controlled data in response.headers, file(..., filename=...), or cookie path and domain attributes can therefore emit injected headers and may split responses. Depending on application and proxy behavior, this can enable session fixation through injected cookies, cache poisoning, or security-header corruption. This issue is fixed in versions 24.12.1 and 25.12.1.
Timeline
ID reserved
By GitHub_M
- 15 days later
· 15 days later
Published
- 4 days later
· 4 days later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| GitHub_MCNA (assigner) | 3.1 | High8.2 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:N |
| NVDNVD · Awaiting Analysis | 3.1 | High8.2 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:N |
- EPSS (exploitation in 30 days)
- 0.48% · top 58% of all CVEs (7 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: yes · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 8.2.
Weakness
Affected products
References (8)
- https://github.com/sanic-org/sanic/security/advisories/GHSA-m64h-22vf-48wm (opens in a new tab)x_refsource_CONFIRM
- https://github.com/sanic-org/sanic/pull/3164 (opens in a new tab)x_refsource_MISC
- https://github.com/sanic-org/sanic/pull/3165 (opens in a new tab)x_refsource_MISC
- https://github.com/sanic-org/sanic/commit/47349d689d65fa1907977ac100e867894aeafb22 (opens in a new tab)x_refsource_MISC
- https://github.com/sanic-org/sanic/commit/9a95bb1c187558949606b915f5162c15f2db781b (opens in a new tab)x_refsource_MISC
- https://github.com/sanic-org/sanic/commit/a332796506c7c588b6930b02a8886e43eb8ea8d6 (opens in a new tab)x_refsource_MISC
- https://github.com/sanic-org/sanic/releases/tag/v24.12.1 (opens in a new tab)x_refsource_MISC
- https://github.com/sanic-org/sanic/releases/tag/v25.12.1 (opens in a new tab)x_refsource_MISC
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2026-85077)Record last updated .