CVE-2026-112880

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Source
https://cve.org/CVERecord?id=CVE-2026-112880
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-112880.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-112880
Aliases
Published
2026-10-26T13:48:46Z
Modified
2026-11-11T10:47:23Z
Severity
  • 2.1 (Low) CVSS_V4 - CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:L/SA:N CVSS Calculator
Summary
CRLF injection in Proxy-Authorization header built from proxy_auth_fun in hackney
Details

Improper Neutralization of CRLF Sequences in HTTP Headers ('HTTP Request/Response Splitting') vulnerability in hackney_http_connect in benoitc hackney allows HTTP Request Splitting via the value a proxy_auth_fun callback returns. After a 407 response from an HTTP CONNECT proxy, hackney_http_connect:handle_proxy_auth/11 calls the caller's proxy_auth_fun with the status code and the response headers and writes the returned binary into the Proxy-Authorization line of the CONNECT retry without checking it. A CR, LF or NUL byte in that value adds header lines to the request sent to the proxy.

The value is attacker-influenced when the callback derives it from untrusted data, for example from the proxy's challenge headers. Other caller-supplied values on the CONNECT path, such as the target host and the request headers, were already checked for control bytes.

This issue affects hackney: from 2.0.0 before 4.9.0.

Database specific 
{
    "cna_assigner": "EEF",
    "cwe_ids": [
        "CWE-113"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/112xxx/CVE-2026-112880.json"
}
References

Affected packages

Git / github.com/benoitc/hackney

Affected ranges

Type
GIT
Repo
https://github.com/benoitc/hackney
Events
Introduced
5df5a74a2817d5b12880d217db33253ff1fae1b5
Fixed
5ee7d7d19eba27e774667d472feb1e93a08af7f9
Introduced
a7ce34b42892ab305b2ef7dbe873bcabf4ef93ca
Fixed
0f5db333d43600e7b9fb9346143b4e9fdb8924ea
Fixed
5df5a74a2817d5b12880d217db33253ff1fae1b5
Database specific
Show details 
{
    "extracted_events": [
        {
            "range": [
                {
                    "introduced": "5df5a74a2817d5b12880d217db33253ff1fae1b5"
                },
                {
                    "fixed": "5ee7d7d19eba27e774667d472feb1e93a08af7f9"
                }
            ],
            "source": "AFFECTED_FIELD",
            "strategy": "StandardRange"
        },
        {
            "range": [
                {
                    "introduced": "2.0.0"
                },
                {
                    "fixed": "4.9.0"
                }
            ],
            "source": "AFFECTED_FIELD",
            "strategy": "StandardRange"
        },
        {
            "original_tag": "4.9.0",
            "range": [
                {
                    "fixed": "0f5db333d43600e7b9fb9346143b4e9fdb8924ea"
                }
            ],
            "source": "REFERENCES_TAG"
        },
        {
            "range": [
                {
                    "fixed": "5df5a74a2817d5b12880d217db33253ff1fae1b5"
                }
            ],
            "source": "REFERENCES_COMMIT"
        },
        {
            "range": [
                {
                    "fixed": "5ee7d7d19eba27e774667d472feb1e93a08af7f9"
                }
            ],
            "source": "REFERENCES_COMMIT"
        }
    ]
}

Affected versions

2.*
2.0.0
2.0.1
3.*
3.0.1
3.0.2
3.0.3
3.1.0
3.1.1
3.1.2
3.2.0
3.2.1
4.*
4.0.0
4.0.1
4.0.2
4.0.3
4.1.0
4.2.0
4.2.1
4.2.2
4.2.3
4.3.0
4.4.0
4.4.1
4.4.2
4.4.3
4.4.4
4.4.5
4.5.0
4.5.1
4.5.2
4.6.0
4.6.1
4.7.0
4.7.1
4.7.2
4.7.3
4.7.4
4.8.0
4.8.1
4.8.2
4.8.3
4.8.4
4.8.5
4.8.6
4.8.7

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-112880.json"