CVE-2026-123204

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Source
https://cve.org/CVERecord?id=CVE-2026-123204
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-123204.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-123204
Published
2026-11-05T18:16:39Z
Modified
2026-11-05T21:32:27Z
Severity
  • 5.3 (Medium) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:N/SC:L/SI:N/SA:N CVSS Calculator
Summary
Posta before v0.18.0 SSRF via Webhook URL
Details

Posta before v0.18.0 contains a server-side request forgery vulnerability that allows authenticated users with edit rights to make the backend send POST requests to internal destinations by creating webhooks with arbitrary URLs. Attackers can target loopback, private-network or cloud metadata addresses and read delivery status codes and error strings to probe internal hosts and ports.

Database specific 
{
    "cna_assigner": "VulnCheck",
    "cwe_ids": [
        "CWE-918"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/123xxx/CVE-2026-123204.json"
}
References

Affected packages

Git / github.com/goposta/posta

Affected ranges

Type
GIT
Repo
https://github.com/goposta/posta
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
a10e925b5c5b3be1eafe83bab666240f26173cc6
Fixed
6bb376b55dcfdcb979040ed42c4bf57b99e4f46a
Database specific
Show details 
{
    "extracted_events": [
        {
            "range": [
                {
                    "introduced": "0"
                },
                {
                    "fixed": "v0.18.0"
                }
            ],
            "source": "AFFECTED_FIELD",
            "strategy": "StandardRange"
        },
        {
            "range": [
                {
                    "fixed": "6bb376b55dcfdcb979040ed42c4bf57b99e4f46a"
                }
            ],
            "source": "REFERENCES_COMMIT"
        },
        {
            "original_tag": "v0.18.0",
            "range": [
                {
                    "fixed": "a10e925b5c5b3be1eafe83bab666240f26173cc6"
                }
            ],
            "source": "REFERENCES_TAG"
        }
    ]
}

Affected versions

v0.*
v0.1.0
v0.10.0
v0.10.1
v0.11.0
v0.12.0
v0.12.0-rc.1
v0.12.0-rc.2
v0.13.0
v0.13.1
v0.13.2
v0.14.0
v0.14.0-rc.1
v0.14.0-rc.2
v0.14.0-rc.3
v0.15.0
v0.15.0-rc.1
v0.15.0-rc.2
v0.15.1
v0.16.0
v0.16.0-rc.1
v0.17.0
v0.17.0-rc.1
v0.18.0-rc.1
v0.18.0-rc.2
v0.18.0-rc.3
v0.2.0
v0.2.1
v0.3.0
v0.4.0
v0.5.0
v0.5.1
v0.5.2
v0.5.3
v0.6.0
v0.6.1
v0.6.2
v0.6.3
v0.6.4
v0.6.5
v0.6.6
v0.7.0
v0.8.0
v0.8.0-rc.1
v0.8.0-rc.2
v0.9.0
v0.9.0-rc.1
v0.9.0-rc.2
v0.9.0-rc.3

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-123204.json"