CURL-CVE-2026-13608

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Source
https://curl.se/docs/CVE-2026-13608.html
Import Source
https://curl.se/docs/CURL-CVE-2026-13608.json
JSON Data
https://api.osv.dev/v1/vulns/CURL-CVE-2026-13608
Aliases
  • CVE-2026-13608
Published
2026-09-02T08:00:00Z
Modified
2026-09-02T08:04:19.827580Z
Summary
OpenLDAP SASL authentication bypass
Details

A flaw in the libcurl SASL negotiation for LDAP authentication allows an incomplete handshake sequence to be misinterpreted as a successful cryptographic verification. An attacker executing a Man-in-the-Middle (MITM) attack can inject a premature or shortcut response that bypasses complete peer validation.

Database specific 
{
    "URL": "https://curl.se/docs/CVE-2026-13608.json",
    "CWE": {
        "desc": "Improper Restriction of Communication Channel to Intended Endpoints",
        "id": "CWE-923"
    },
    "package": "curl",
    "affects": "both",
    "last_affected": "8.21.0",
    "www": "https://curl.se/docs/CVE-2026-13608.html",
    "severity": "Low",
    "issue": "https://hackerone.com/reports/3822248"
}
References
Credits
    • Eunsoo Kim (Autonomous Code Security team at Microsoft) - FINDER
    • Eunsoo Kim - REMEDIATION_DEVELOPER

Affected packages

Git / github.com/curl/curl.git

Affected ranges

Type
SEMVER
Events
Introduced
7.82.0
Fixed
8.22.0
Type
GIT
Repo
https://github.com/curl/curl.git
Events
Introduced
eeca818b1e8d1e61c2d4d833aed56ce4c510a9d4
Fixed
ea71c3b6b60e563651ea8596a975aef0c8199519

Affected versions

7.*
7.82.0
7.83.0
7.83.1
7.84.0
7.85.0
7.86.0
7.87.0
7.88.0
7.88.1
8.*
8.0.0
8.0.1
8.1.0
8.1.1
8.1.2
8.10.0
8.10.1
8.11.0
8.11.1
8.12.0
8.12.1
8.13.0
8.14.0
8.14.1
8.15.0
8.16.0
8.17.0
8.18.0
8.19.0
8.2.0
8.2.1
8.20.0
8.21.0
8.3.0
8.4.0
8.5.0
8.6.0
8.7.0
8.7.1
8.8.0
8.9.0
8.9.1
Other
curl-7_82_0
curl-7_83_0
curl-7_83_1
curl-7_84_0
curl-7_85_0
curl-7_86_0
curl-7_87_0
curl-7_88_0
curl-7_88_1
curl-8_0_0
curl-8_0_1
curl-8_10_0
curl-8_10_1
curl-8_11_0
curl-8_11_1
curl-8_12_0
curl-8_12_1
curl-8_13_0
curl-8_14_0
curl-8_14_1
curl-8_15_0
curl-8_16_0
curl-8_17_0
curl-8_18_0
curl-8_19_0
curl-8_1_0
curl-8_1_1
curl-8_1_2
curl-8_20_0
curl-8_21_0
curl-8_2_0
curl-8_2_1
curl-8_3_0
curl-8_4_0
curl-8_5_0
curl-8_6_0
curl-8_7_0
curl-8_7_1
curl-8_8_0
curl-8_9_0
curl-8_9_1
rc-8_18_0-1
rc-8_18_0-2
rc-8_18_0-3
rc-8_19_0-1
rc-8_19_0-2
rc-8_19_0-3
rc-8_20_0-1
rc-8_20_0-2
rc-8_20_0-3
rc-8_21_0-1
rc-8_21_0-2
rc-8_21_0-3
tiny-curl-8_4_0

Database specific

vanir_signatures 
[
    {
        "signature_type": "Line",
        "deprecated": false,
        "digest": {
            "line_hashes": [
                "326639408536088429782387452173430813488",
                "309793192306506390906797793866759243868",
                "25094943265867132959496315694728531457",
                "131351165008478471621245708616349825336",
                "194811653429796140974907197863500476284"
            ],
            "threshold": 0.9
        },
        "id": "CURL-CVE-2026-13608-2ddb3aa2",
        "target": {
            "file": "lib/openldap.c"
        },
        "source": "https://github.com/curl/curl.git/commit/ea71c3b6b60e563651ea8596a975aef0c8199519",
        "signature_version": "v1"
    },
    {
        "signature_type": "Function",
        "deprecated": false,
        "digest": {
            "length": 713.0,
            "function_hash": "241857058883287100469178053667771510182"
        },
        "id": "CURL-CVE-2026-13608-cc8eade8",
        "target": {
            "function": "oldap_state_sasl_resp",
            "file": "lib/openldap.c"
        },
        "source": "https://github.com/curl/curl.git/commit/ea71c3b6b60e563651ea8596a975aef0c8199519",
        "signature_version": "v1"
    }
]
source 
"https://curl.se/docs/CURL-CVE-2026-13608.json"
vanir_signatures_modified 
"2026-09-02T08:04:19Z"