How severe is CVE-2026-5760?

CVE-2026-5760 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-2026-5760 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (56th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-5760?

CVE-2026-5760 affects Lmsys Sglang. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-5760?

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-2026-5760 have an EU (EUVD) identifier?

Yes. CVE-2026-5760 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-23860.

When was CVE-2026-5760 published?

CVE-2026-5760 was published on 2026-04-20 and last updated on 2026-06-17.

CVE-2026-5760

CVE-2026-5760 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-94.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
EPSS exploit prediction: 1% (56th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-23860
Weakness: CWE-94
Affected product: Lmsys Sglang
Published: 2026-04-20
Last modified: 2026-06-17

Description

SGLang's reranking endpoint (/v1/rerank) achieves Remote Code Execution (RCE) when a model file containing a malcious tokenizer.chat_template is loaded, as the Jinja2 chat templates are rendered using an unsandboxed jinja2.Environment().

Frequently asked questions

What is CVE-2026-5760?: SGLang's reranking endpoint (/v1/rerank) achieves Remote Code Execution (RCE) when a model file containing a malcious tokenizer.chat_template is loaded, as the Jinja2 chat templates are rendered using an unsandboxed jinja2.Environment().
How severe is CVE-2026-5760?: CVE-2026-5760 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-2026-5760 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (56th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-5760?: CVE-2026-5760 affects Lmsys Sglang. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-5760?: 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-2026-5760 have an EU (EUVD) identifier?: Yes. CVE-2026-5760 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-23860.
When was CVE-2026-5760 published?: CVE-2026-5760 was published on 2026-04-20 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:lmsys:sglang:*:*:*:*:*:*:*:*

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