Public proof of conceptFix available

CVE-2026-3059

Q: Is CVE-2026-3059 actively exploited?

A proof-of-concept exploit exists for CVE-2026-3059, but active exploitation has not been confirmed at this time.

Q: What is the CVSS score for CVE-2026-3059?

CVE-2026-3059 has a CVSS v3 base score of 9.8 (CRITICAL severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

A public proof of concept exists; no exploitation attested.

Published2026-03-12
WeaknessCWE-502

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

SGLang's multimodal generation module is vulnerable to unauthenticated remote code execution through the ZMQ broker, which deserializes untrusted data using pickle.loads() without authentication.

Timeline

dates in UTC

2026-03-1212:15CVE publishedNVD

Observed activity

isMalicious corpus · updated 2026-10-23 21:37 UTC

Indicators tagged with this CVE, per day0 indicators over 7 days

Block these indicators

Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2026-3059?format=txt
CSV export: https://api.ismalicious.com/edl/cve/CVE-2026-3059?format=csv
TAXII collection of exploited CVEs
The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD · OSV

Lmsys sglang

Branch	Affected	Fixed in	Source
0.5	≥ 0.5.5, ≤ 0.5.9	no fix published	NVD

sglang

Branch	Affected	Fixed in	Source
0.5	< 0.5.10	0.5.10	OSV

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Fix

Advisories and patches

orca.securityMitigation

Detection

Nuclei template: none so far
Exploit-DB: no entry
Proof-of-concept repositories: none listed

Sources

NVDCVE recordread 2026-10-23
CISA-ADPSSVC decisionpoc2026-03-12
OpenCVESSVC decisionpoc—
CISA-ADPCVSS 3.19.82026-03-12
CISA-ADPweakness (CWE)CWE-5022026-03-12
FIRST EPSSEPSS score1.5 %2026-10-22
OSVaffected packages—

Technical details

CVSS v3 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Published: 2026-03-12
Last Modified: 2026-06-17
NVD status: Modified

Frequently asked questions

What is CVE-2026-3059?

SGLang's multimodal generation module is vulnerable to unauthenticated remote code execution through the ZMQ broker, which deserializes untrusted data using pickle.loads() without authentication.

Is CVE-2026-3059 actively exploited?

A proof-of-concept exploit exists for CVE-2026-3059, but active exploitation has not been confirmed at this time.

What is the CVSS score for CVE-2026-3059?

CVE-2026-3059 has a CVSS v3 base score of 9.8 (CRITICAL severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Running sglang? Hear about its next vulnerability

Surveillance reads the versions in your stack — a domain, a lockfile or a list — checks each CVE against the ranges its sources publish, and alerts you when one you run is exploited or enters CISA KEV. A version it cannot read stays « version not verified ».

Get alerts for this product CISA KEV additions, October 2026 Search CVEs

No credit card required · No monthly cap on website lookups · 250 API requests/month

Go further

Following what attackers exploit right now? The CISA KEV additions of the month, with their patch deadlines.
Running this software? Vulnerability monitoring alerts you to new vulnerabilities in your products.

Related vulnerabilities

Same product first, then the same vendor advisory and the same publication week.

Back to CVE Database