CVE-2026-85078

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Source
https://cve.org/CVERecord?id=CVE-2026-85078
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-85078.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-85078
Aliases
Published
2026-09-17T14:28:37Z
Modified
2026-09-19T03:46:17Z
Severity
  • 6.5 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L CVSS Calculator
Summary
sanic chunked trailer request smuggling allows hidden second request execution
Details

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.

Database specific 
{
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
        "CWE-444"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/85xxx/CVE-2026-85078.json"
}
References

Affected packages

Git / github.com/sanic-org/sanic

Affected ranges

Type
GIT
Repo
https://github.com/sanic-org/sanic
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Introduced
785d77f8fe208576a48d339bd81d866021154092
Fixed
47349d689d65fa1907977ac100e867894aeafb22
Fixed
ef9240ce844472745fa213de216a37e188431fa6
Fixed
69a10d3b06babaa9e5f6d1af577364e9e53b6dea
Fixed
a332796506c7c588b6930b02a8886e43eb8ea8d6
Database specific
Show details 
{
    "extracted_events": [
        {
            "introduced": "0"
        },
        {
            "fixed": "24.12.1"
        },
        {
            "introduced": "25.12.0"
        },
        {
            "fixed": "25.12.1"
        }
    ],
    "source": [
        "AFFECTED_FIELD",
        "REFERENCES"
    ]
}

Affected versions

0.*
0.1.2
0.1.3
0.1.4
0.1.5
0.1.6
0.1.7
0.1.8
0.1.9
0.2.0
0.3.0
0.3.1
0.4.0
0.4.1
0.5.0
0.5.1
0.5.2
0.5.3
0.5.4
0.6.0
0.7.0
0.8.0
0.8.1
0.8.2
0.8.3
18.*
18.12.0
19.*
19.03.1
19.3
v19.*
v19.12.1
v19.6.0
v19.6.1
v19.6.2
v19.6.3
v19.9.0
v20.*
v20.12.0
v20.3.0
v20.6.3
v20.9.0
v20.9.1
v21.*
v21.12.0
v21.3.0
v21.3.1
v21.3.2
v21.6.0
v21.9.0
v21.9.1
v22.*
v22.12.0
v22.3.0
v22.3.1
v22.6.0
v22.9.0
v22.9.1
v23.*
v23.3.0
v23.6.0
v24.*
v24.12.0
v25.*
v25.3.0

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-85078.json"