CVE-2026-14890: SGLang uses an expert-parallel backup subsystem that exposes a ZeroMQ PULL socket on a routable network interf

Q: How do I fix CVE-2026-14890?

sglang: upgrade to newer than 0.5.14. Exact commands for each OS are on this page.

Q: Is CVE-2026-14890 being exploited?

CVE-2026-14890 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-14890 affect?

CVE-2026-14890 affects sglang. Severity is critical (CVSS 9.1). SGLang uses an expert-parallel backup subsystem that exposes a ZeroMQ PULL socket on a routable network interface that does not contain authentication or deserialization safeguards, allowing an attacker to provide a malicious pickle file th

Q: How urgent is CVE-2026-14890?

Priority 52/100. Critical severity; Remotely exploitable, no login, no user action

This month

CRITICAL 9.1REMOTEUPGRADE

CVE-2026-14890 is a critical-severity flaw (CVSS 9.1) affecting sglang. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

SGLang uses an expert-parallel backup subsystem that exposes a ZeroMQ PULL socket on a routable network interface that does not contain authentication or deserialization safeguards, allowing an attacker to provide a malicious pickle file that results in unauthenticated remote code execution when the feature is enabled and the service is reachable over the network.

Why this priority

Critical severity
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	9.1 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	1.0% (top 37%)
CISA exploited list	No
Weakness	CWE-502
Published	2026-07-16
Last modified	2026-08-10

Publisher (CNA): CERT/CC · Vendor: lmsys

Last updated 2026-08-10 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-07-16 16:19 UTCPublished CVE record published
2026-08-10 14:13 UTCUpdated Record last modified

lmsys sglang UPGRADE

Affected: <= 0.5.14

Fixed in: newer than 0.5.14

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy sglang || rpm -q sglang || sglang --version

2. UPGRADE to newer than 0.5.14 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade sglang

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade sglang

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-14890?

sglang: upgrade to newer than 0.5.14. Exact commands for each OS are on this page.

Is CVE-2026-14890 being exploited?

CVE-2026-14890 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-14890 affect?

CVE-2026-14890 affects sglang. Severity is critical (CVSS 9.1). SGLang uses an expert-parallel backup subsystem that exposes a ZeroMQ PULL socket on a routable network interface that does not contain authentication or deserialization safeguards, allowing an attacker to provide a malicious pickle file th

How urgent is CVE-2026-14890?

Priority 52/100. Critical severity; Remotely exploitable, no login, no user action

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References

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