How severe is CVE-2026-15977?

CVE-2026-15977 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2026-15977 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (16th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-15977?

CVE-2026-15977 affects Lmsys Sglang. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-15977?

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

When was CVE-2026-15977 published?

CVE-2026-15977 was published on 2026-07-30 and last updated on 2026-08-04.

CVE-2026-15977

CVE-2026-15977 is a high-severity vulnerability in Lmsys Sglang with a CVSS 3.x base score of 7.5. 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-522.

Key facts

Severity: High (CVSS 3.x base score 7.5)
EPSS exploit prediction: 0% (16th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-522
Affected product: Lmsys Sglang
Published: 2026-07-30
Last modified: 2026-08-04

Description

SGLang contains a credential leakage vulnerability in the /server_info endpoint, which will return API keys and SSL keyfile information when only the --admin-api-key is configured.

Frequently asked questions

What is CVE-2026-15977?: SGLang contains a credential leakage vulnerability in the /server_info endpoint, which will return API keys and SSL keyfile information when only the --admin-api-key is configured.
How severe is CVE-2026-15977?: CVE-2026-15977 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2026-15977 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (16th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-15977?: CVE-2026-15977 affects Lmsys Sglang. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-15977?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2026-15977 published?: CVE-2026-15977 was published on 2026-07-30 and last updated on 2026-08-04.

References

Affected products (1)

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

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