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VulnerabilityPublished Updated

CVE-2026-92972: sgl-project sglang · Missing Authentication

Affects sgl-project sglangSource CVE Database V5

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Not known to be exploited · CVSS 8.8 High : upgrade to 0.5.20 soon.

Data as of 1 Nov 2026, 22:58 UTC

CVSS 4.0 base score
8.8High
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.4% chance of exploitation in 30 days – higher than 40% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch
Available – fixed in 0.5.20
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:H/SC:N/SI:N/SA:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 17 Sep 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 1 Nov 2026.

What to do

Upgrade sgl-project/sglang to 0.5.20.

Affected software

ProductAffectedFixed in
sgl-projectsglangAffected
  • <=0.5.19
Fixed in–
GitHubsgl-project/sglangpkg:github/sgl-project/sglangOther threatsAffected
  • <0.5.20
Fixed in
  • 0.5.20

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

If you cannot patch yet, restrict access to the prefill bootstrap service endpoints to trusted networks or authenticated users where possible to reduce exposure.

Description

CVE-2026-92972 is a high-severity vulnerability in SGLang up to version 0.5.19. It involves a missing authentication check on a critical PUT /route endpoint in the prefill bootstrap service when operating in decode disaggregation mode. This flaw allows unauthenticated attackers to poison the key-value transfer routing table by supplying arbitrary rank_ip and rank_port values. Exploitation can lead to denial of service or disclosure of sensitive metadata such as session identifiers and tensor-parallel topology parameters.

References

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