How severe is CVE-2026-7301?

CVE-2026-7301 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2026-7301 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (32nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-7301?

CVE-2026-7301 affects Lmsys Sglang. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-7301?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

Does CVE-2026-7301 have an EU (EUVD) identifier?

Yes. CVE-2026-7301 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-30765.

When was CVE-2026-7301 published?

CVE-2026-7301 was published on 2026-05-18 and last updated on 2026-06-17.

CVE-2026-7301

CVE-2026-7301 is a critical-severity vulnerability in Lmsys Sglang with a CVSS 3.x base score of 9.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-502.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
EPSS exploit prediction: 0% (32nd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-30765
Weakness: CWE-502
Affected product: Lmsys Sglang
Published: 2026-05-18
Last modified: 2026-06-17

Description

SGLangs multimodal generation runtime scheduler's ROUTER socket binds to 0.0.0.0 by default and contains a sink that calls pickle.loads() on incoming messages, enabling RCE when exposed to the internet.

Frequently asked questions

What is CVE-2026-7301?: SGLangs multimodal generation runtime scheduler's ROUTER socket binds to 0.0.0.0 by default and contains a sink that calls pickle.loads() on incoming messages, enabling RCE when exposed to the internet.
How severe is CVE-2026-7301?: CVE-2026-7301 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2026-7301 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (32nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-7301?: CVE-2026-7301 affects Lmsys Sglang. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-7301?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
Does CVE-2026-7301 have an EU (EUVD) identifier?: Yes. CVE-2026-7301 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-30765.
When was CVE-2026-7301 published?: CVE-2026-7301 was published on 2026-05-18 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:lmsys:sglang:0.5.10:-:*:*:*:*:*:*

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