CVE-2026-93838

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Source
https://cve.org/CVERecord?id=CVE-2026-93838
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-93838.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-93838
Downstream
Related
Published
2026-09-18T19:06:03Z
Modified
2026-09-25T03:30:29Z
Severity
  • 8.2 (High) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N CVSS Calculator
Summary
SGLang through 0.5.20 Unbounded Memory Allocation via STAGING_REQ chunk_idx
Details

SGLang versions through 0.5.20 contain an unbounded memory allocation vulnerability in handle_staging_req() that fails to validate chunk_idx from ZMQ STAGING_REQ frames in prefill/decode disaggregation deployments. Attackers with access to the decode engine's internal ZMQ rank port can send a frame with an extremely large chunk_idx value, causing the scheduler to allocate memory until the system runs out and terminates the process.

Database specific 
{
    "cna_assigner":  "VulnCheck",
    "cwe_ids":  [
        "CWE-770"
    ],
    "osv_generated_from":  "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/93xxx/CVE-2026-93838.json"
}
References

Affected packages

Git / github.com/sgl-project/sglang

Affected ranges

Type
GIT
Repo
https://github.com/sgl-project/sglang
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
94602c9c2b7cbdb8efd5c52802dac6a1c180089e
Database specific
Show details 
{
    "extracted_events":  [
        {
            "introduced":  "0"
        },
        {
            "last_affected":  "0.5.20"
        },
        {
            "fixed":  "0.5.20"
        }
    ],
    "source":  [
        "AFFECTED_FIELD",
        "DESCRIPTION"
    ]
}

Affected versions

gateway-v0.*
gateway-v0.1.5
gateway-v0.1.6
gateway-v0.1.7
gateway-v0.1.8
gateway-v0.1.9
gateway-v0.2.0
gateway-v0.2.1
gateway-v0.2.2
gateway-v0.2.3
gateway-v0.2.4
gateway-v0.3.0
gateway-v0.3.1
v0.*
v0.1.10
v0.1.11
v0.1.12
v0.1.13
v0.1.14
v0.1.15
v0.1.16
v0.1.17
v0.1.18
v0.1.19
v0.1.20
v0.1.21
v0.1.22
v0.1.23
v0.1.24
v0.1.3
v0.1.5
v0.1.6
v0.1.7
v0.1.8
v0.1.9
v0.2.0
v0.2.10
v0.2.11
v0.2.12
v0.2.13
v0.2.14
v0.2.14.post1
v0.2.14.post2
v0.2.15
v0.2.5
v0.2.6
v0.2.7
v0.2.8
v0.2.9
v0.2.9.post1
v0.3.0
v0.3.1.post1
v0.3.1.post2
v0.3.1.post3
v0.3.2
v0.3.3
v0.3.3.post1
v0.3.4
v0.3.4.post1
v0.3.4.post2
v0.3.5
v0.3.5.post1
v0.3.5.post2
v0.3.6
v0.3.6.post1
v0.3.6.post2
v0.3.6.post3
v0.4.0
v0.4.0.post1
v0.4.0.post2
v0.4.1
v0.4.1.post1
v0.4.1.post2
v0.4.1.post3
v0.4.1.post4
v0.4.1.post5
v0.4.1.post6
v0.4.1.post7
v0.4.10
v0.4.10.post1
v0.4.10.post2
v0.4.2
v0.4.2.post1
v0.4.2.post2
v0.4.2.post3
v0.4.2.post4
v0.4.3
v0.4.3.post1
v0.4.3.post2
v0.4.3.post3
v0.4.3.post4
v0.4.4
v0.4.4.post1
v0.4.4.post2
v0.4.4.post3
v0.4.4.post4
v0.4.5
v0.4.5.post1
v0.4.5.post2
v0.4.5.post3
v0.4.6
v0.4.6.post1
v0.4.6.post2
v0.4.6.post3
v0.4.6.post4
v0.4.6.post5
v0.4.7
v0.4.7.post1
v0.4.8
v0.4.8.post1
v0.4.9
v0.4.9.post1
v0.4.9.post2
v0.4.9.post3
v0.4.9.post4
v0.4.9.post5
v0.4.9.post6
v0.5.0rc0
v0.5.0rc1
v0.5.0rc2
v0.5.1
v0.5.1.post1
v0.5.1.post2
v0.5.1.post3
v0.5.2
v0.5.2rc0
v0.5.2rc1
v0.5.2rc2
v0.5.3
v0.5.3.post1
v0.5.3.post2
v0.5.3.post3
v0.5.3rc0
v0.5.3rc1
v0.5.3rc2
v0.5.4
v0.5.4.post1
v0.5.4.post2
v0.5.4.post3
v0.5.5
v0.5.5.post1
v0.5.5.post2
v0.5.5.post3
v0.5.6
v0.5.6.post1
v0.5.6.post2

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-93838.json"