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TI-2026-03453 Aliases CVE-2026-3989GHSA-hvwj-8w5g-28rg

Deserialization of untrusted data in SGLang

Priority HIGH 69CWE-502Published · Updated

Key facts

Attack vector
Local
Privileges required
None
User interaction
Required
Attack complexity
Low
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA and GitHub. Impact type from CWE-502.

Summary

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00538 45th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Fixed sglang (PyPI): 0.5.10

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
SGLangSGLang0.5.10—No fix listedCNA
—sglang (PyPI)before 0.5.100.5.10Patch availableGHSA-hvwj-8w5g-28rg
  • SGLang VendorSGLang Affected 0.5.10 Fixed in — No fix listed CNA
  • sglang (PyPI) Vendor— Affected before 0.5.10 Fixed in 0.5.10 Patch available GHSA-hvwj-8w5g-28rg

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:lmsys:sglang:*:*:*:*:*:*:*:*before 0.5.10VulnerableSGLang
  • cpe:2.3:a:lmsys:sglang:*:*:*:*:*:*:*:* Versions before 0.5.10 Vulnerable ·SGLang

Remediation

  • Fix · GHSA-hvwj-8w5g-28rg sglang (PyPI) Fixed in 0.5.10 Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-3989
  2. 2026-10-03 Alias added: GHSA-hvwj-8w5g-28rg

References

Exploit 1

Patch 1

Advisory 1

Other 4

  • TI-2026-13378 Deserialization of untrusted data in SGLang CVSS 3.1CRITICAL 9.8
  • TI-2026-13373 SGLang contains an RCE vulnerability when the optional dumper subsystem is enabled… CVSS 3.1CRITICAL 9.8
  • TI-2026-05050 Code injection in SGLang CVSS 3.1CRITICAL 9.8
  • TI-2026-02644 Deserialization of untrusted data in SGLang CVSS 3.1CRITICAL 9.8
  • TI-2026-02643 Deserialization of untrusted data in SGLang CVSS 3.1CRITICAL 9.8
  • TI-2026-13380 Missing authentication in SGLang CVSS 3.1HIGH 7.5
See all 14 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences