CVE-2026-67236

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Source
https://cve.org/CVERecord?id=CVE-2026-67236
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-67236.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-67236
Aliases
  • GHSA-88vh-gx85-p36m
Downstream
Published
2026-09-25T15:59:10Z
Modified
2026-09-30T03:30:47Z
Severity
  • 8.2 (High) CVSS_V4 - CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N CVSS Calculator
Summary
RabbitMQ: Plaintext username:password stored in an insecure cookie after successful POST /login
Details

RabbitMQ is a messaging and streaming broker. From 4.2.0 until 4.2.8 and 4.3.2, a successful POST /login caused is_authorized/2 to set an auth cookie containing base64-encoded username:password credentials without HttpOnly, Secure, SameSite, or expiration protections. Because base64 is encoding rather than encryption, an attacker with same-origin cross-site scripting, an HTTP-readable network position, or local access to the browser cookie store could recover the actual login credentials; older browsers that treated an absent SameSite attribute as None also sent the cookie cross-site. This issue is fixed in versions 4.2.8 and 4.3.2.

Database specific 
{
    "cna_assigner":  "GitHub_M",
    "cwe_ids":  [
        "CWE-312"
    ],
    "osv_generated_from":  "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/67xxx/CVE-2026-67236.json"
}
References

Affected packages

Git / github.com/rabbitmq/rabbitmq-server

Affected ranges

Type
GIT
Repo
https://github.com/rabbitmq/rabbitmq-server
Events
Introduced
95c501fbad76c66156346cf364d158d6e30aa4d9
Introduced
1929eeadf9b2bac12c5434fb56884ef27370580e
Fixed
8b611c9f4bd2d1615ef855cdf1459da3196d4d3c
Fixed
a509158b1b1e21c892a7f1dacbe0d158076dc7b8
Fixed
df9e7f4c0afd311a672705f020d301efad355745
Fixed
edf1fbc7217aaf736955d2e13c9534901a2e0778
Database specific
Show details 
{
    "extracted_events":  [
        {
            "introduced":  "4.2.0"
        },
        {
            "fixed":  "4.2.8"
        },
        {
            "introduced":  "4.3.0"
        },
        {
            "fixed":  "4.3.2"
        }
    ],
    "source":  [
        "AFFECTED_FIELD",
        "REFERENCES"
    ]
}

Affected versions

v4.*
v4.2.0
v4.2.1
v4.2.2
v4.2.3
v4.2.4
v4.2.5
v4.2.6
v4.2.7
v4.3.0
v4.3.1

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-67236.json"