CVE-2026-55162

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Source
https://cve.org/CVERecord?id=CVE-2026-55162
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-55162.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-55162
Aliases
Published
2026-08-18T18:52:25Z
Modified
2026-09-10T03:30:17Z
Severity
  • 6.3 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L CVSS Calculator
Summary
Lemur: Post-authentication SSRF via certificate verification - attacker-controlled CRL and OCSP URLs in uploaded certificates
Details

Lemur manages TLS certificate creation. Prior to 1.9.2, lemur/certificates/verify.py accepted CRL Distribution Point and OCSP responder URLs from uploaded certificate extensions and used them in crl_verify and ocsp_verify without adequate destination validation. An authenticated operator could submit a certificate through POST /api/1/certificates/upload and cause verify_string to reach loopback, RFC1918, link-local, or instance-metadata destinations such as 169.254.169.254. The requests could probe internal services and create side effects from the Lemur host network position. The CRL path also used an unbounded cache, allowing attacker-controlled entries to persist and consume memory. The fix validates destinations, supports explicit trusted-host allowlists, and bounds the CRL cache. This issue is fixed in version 1.9.2.

Database specific 
{
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
        "CWE-918"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/55xxx/CVE-2026-55162.json"
}
References

Affected packages

Git / github.com/netflix/lemur

Affected ranges

Type
GIT
Repo
https://github.com/netflix/lemur
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
733714a2b00b2f72c3d460e440770e46a3ea9d6a
Fixed
4afd730de39fa9370f6c24ea8af7fcaa45430310
Database specific
Show details 
{
    "extracted_events": [
        {
            "introduced": "0"
        },
        {
            "fixed": "1.9.2"
        }
    ],
    "source": [
        "AFFECTED_FIELD",
        "REFERENCES"
    ]
}

Affected versions

0.*
0.1
0.1.2
0.1.3
0.1.4
0.1.5
0.2
0.2.1
0.2.2
0.3.0
0.4.0
0.5.0
0.6.0
0.7.0
0.8.0
v0.*
v0.10.0
v0.11.0
v0.8.1
v0.9.0
v1.*
v1.0.0
v1.1.0
v1.2.0
v1.3.0
v1.3.1
v1.3.2
v1.4.0
v1.5.0
v1.6.0
v1.7.0
v1.8.0
v1.8.1
v1.8.2
v1.9.0
v1.9.1

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-55162.json"