High severity · published Mar 12, 2026
CVE-2026-3989
No description published yet
7.8
CVSS
0.5%
EPSS
No
On KEV
Description
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 vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Attack vector
Local
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.5% · higher than 42% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
SG
SGLang · SGLang
0.5.10 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-3989
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-3989
Product
https://github.com/sgl-project/sglang/blob/main/scripts/playground/replay_request_dump.py
Issue Tracking
https://github.com/sgl-project/sglang/pull/20904
Release Notes
https://github.com/sgl-project/sglang/releases/tag/v0.5.10
Exploit
https://orca.security/resources/blog/sglang-llm-framework-rce-vulnerabilities/
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