CVE-2026-3989

SGLangs `replay_request_dump.py` contains an insecure pickle.load() without validation and proper deserialization. An attacker can take advantage of this by providing a malicious .pkl file, which will execute the attackers code on the device running the script.

CVSS v3 7.8 HIGH

7.8^/10

CVSS v3 : HIGH

Vector :

Exploitability : 1.8 / Impact : 5.9

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://github.com/sgl-project/sglang/blob/main/scripts/playground/replay_request_dump.py	Product
https://github.com/sgl-project/sglang/pull/20904	Issue Tracking Patch
https://github.com/sgl-project/sglang/releases/tag/v0.5.10	Release Notes
https://orca.security/resources/blog/sglang-llm-framework-rce-vulnerabilities/	Exploit Third Party Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:lmsys:sglang:*:*:*:*:*:*:*:*

History

No history.

Information

Published : 2026-03-12 12:15

Updated : 2026-08-10 14:32

NVD link : CVE-2026-3989

Mitre link : CVE-2026-3989

CVE.ORG link : CVE-2026-3989

JSON object : View

Products Affected

lmsys

sglang

CWE

CWE-502

Deserialization of Untrusted Data

{"id": "CVE-2026-3989", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-3989", "role": "CISA Coordinator", "options": [{"exploitation": "poc"}, {"automatable": "no"}, {"technicalImpact": "total"}], "version": "2.0.3", "timestamp": "2026-03-16T18:21:15.871965Z"}}], "cvssMetricV31": [{"type": "Secondary", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.8, "attackVector": "LOCAL", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "REQUIRED", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}, "impactScore": 5.9, "exploitabilityScore": 1.8}]}, "affected": [{"source": "cret@cert.org", "affectedData": [{"vendor": "SGLang", "product": "SGLang", "versions": [{"status": "affected", "version": "0.5.10"}]}]}], "published": "2026-03-12T12:15:59.630", "references": [{"url": "https://github.com/sgl-project/sglang/blob/main/scripts/playground/replay_request_dump.py", "tags": ["Product"], "source": "cret@cert.org"}, {"url": "https://github.com/sgl-project/sglang/pull/20904", "tags": ["Issue Tracking", "Patch"], "source": "cret@cert.org"}, {"url": "https://github.com/sgl-project/sglang/releases/tag/v0.5.10", "tags": ["Release Notes"], "source": "cret@cert.org"}, {"url": "https://orca.security/resources/blog/sglang-llm-framework-rce-vulnerabilities/", "tags": ["Exploit", "Third Party Advisory"], "source": "cret@cert.org"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "CWE-502"}]}], "descriptions": [{"lang": "en", "value": "SGLangs `replay_request_dump.py` contains an insecure pickle.load() without validation and proper deserialization. An attacker can take advantage of this by providing a malicious .pkl file, which will execute the attackers code on the device running the script."}, {"lang": "es", "value": "SGLangs 'replay_request_dump.py' contiene un pickle.load() inseguro sin validaci\u00f3n y una deserializaci\u00f3n adecuada. Un atacante puede aprovechar esto al proporcionar un archivo .pkl malicioso, lo que ejecutar\u00e1 el c\u00f3digo del atacante en el dispositivo que ejecuta el script."}], "lastModified": "2026-08-10T14:32:40.693", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:lmsys:sglang:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "81EEB29C-2BB1-4AA5-87FC-013B0BB758CD", "versionEndExcluding": "0.5.10"}], "operator": "OR"}]}], "sourceIdentifier": "cret@cert.org"}