{"id":"CVE-2026-7669","state":"PUBLISHED","title":"sgl-project SGLang HuggingFace Transformer hf_transformers_utils.py get_tokenizer code injection","description":"A vulnerability was detected in sgl-project SGLang up to 0.5.9. Impacted is the function get_tokenizer of the file python/sglang/srt/utils/hf_transformers_utils.py of the component HuggingFace Transformer Handler. The manipulation of the argument trust_remote_code with the input False as part of Boolean results in code injection. The attack can be executed remotely. A high complexity level is associated with this attack. The exploitability is considered difficult. In get_tokenizer(), when the caller passes trust_remote_code=False and HuggingFace transformers v5 returns a TokenizersBackend instance (the generic fallback for tokenizer classes not in the registry), SGLang silently re-invokes AutoTokenizer.from_pretrained with trust_remote_code=True, overriding the caller's explicit security setting. A model repository containing a malicious tokenizer.py referenced via auto_map in tokenizer_config.json will execute arbitrary Python in the SGLang process during this second call. No log line or warning is emitted. The override affects all current SGLang versions because transformers==5.3.0 is pinned in pyproject.toml. Both tokenizer_mode=\"auto\" and tokenizer_mode=\"slow\" are affected. The exploit is now public and may be used. The vendor was contacted early about this disclosure but did not respond in any way.","publishedAt":"2026-05-02T22:00:19.859Z","updatedAt":"2026-05-05T00:31:40.051Z","severity":{"score":6.3,"label":"Medium","version":"4.0","vector":"CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:X","source":"VulDB"},"assigner":"VulDB","products":["sgl-project SGLang"],"affected":[{"vendor":"sgl-project","product":"SGLang","versions":[{"version":"0.5.0","status":"affected"},{"version":"0.5.1","status":"affected"},{"version":"0.5.2","status":"affected"},{"version":"0.5.3","status":"affected"},{"version":"0.5.4","status":"affected"},{"version":"0.5.5","status":"affected"},{"version":"0.5.6","status":"affected"},{"version":"0.5.7","status":"affected"},{"version":"0.5.8","status":"affected"},{"version":"0.5.9","status":"affected"}],"modules":["HuggingFace Transformer Handler"]}],"references":["https://vuldb.com/vuln/360817","https://vuldb.com/vuln/360817/cti","https://vuldb.com/submit/799263","https://github.com/gouldnicholas/CVE-2026-7669-PoC"],"weaknesses":["CWE-94","CWE-74"],"ingestedAt":"2026-10-29T20:13:07.220Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/7xxx/CVE-2026-7669.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-7669","state":"PUBLISHED","datePublished":"2026-05-02T22:00:19.859Z","dateUpdated":"2026-05-05T00:31:40.051Z","assignerShortName":"VulDB","assignerOrgId":"1af790b2-7ee1-4545-860a-a788eba489b5","dateReserved":"2026-05-02T08:00:13.701Z"},"containers":{"cna":{"title":"sgl-project SGLang HuggingFace Transformer hf_transformers_utils.py get_tokenizer code injection","descriptions":[{"lang":"en","value":"A vulnerability was detected in sgl-project SGLang up to 0.5.9. Impacted is the function get_tokenizer of the file python/sglang/srt/utils/hf_transformers_utils.py of the component HuggingFace Transformer Handler. The manipulation of the argument trust_remote_code with the input False as part of Boolean results in code injection. The attack can be executed remotely. A high complexity level is associated with this attack. The exploitability is considered difficult. In get_tokenizer(), when the caller passes trust_remote_code=False and HuggingFace transformers v5 returns a TokenizersBackend instance (the generic fallback for tokenizer classes not in the registry), SGLang silently re-invokes AutoTokenizer.from_pretrained with trust_remote_code=True, overriding the caller's explicit security setting. A model repository containing a malicious tokenizer.py referenced via auto_map in tokenizer_config.json will execute arbitrary Python in the SGLang process during this second call. No log line or warning is emitted. The override affects all current SGLang versions because transformers==5.3.0 is pinned in pyproject.toml. Both tokenizer_mode=\"auto\" and tokenizer_mode=\"slow\" are affected. The exploit is now public and may be used. The vendor was contacted early about this disclosure but did not respond in any way."}],"affected":[{"vendor":"sgl-project","product":"SGLang","versions":[{"version":"0.5.0","status":"affected"},{"version":"0.5.1","status":"affected"},{"version":"0.5.2","status":"affected"},{"version":"0.5.3","status":"affected"},{"version":"0.5.4","status":"affected"},{"version":"0.5.5","status":"affected"},{"version":"0.5.6","status":"affected"},{"version":"0.5.7","status":"affected"},{"version":"0.5.8","status":"affected"},{"version":"0.5.9","status":"affected"}],"modules":["HuggingFace Transformer Handler"]}],"references":[{"url":"https://vuldb.com/vuln/360817","name":"VDB-360817 | sgl-project SGLang HuggingFace Transformer hf_transformers_utils.py get_tokenizer code injection","tags":["vdb-entry","technical-description","exploit"]},{"url":"https://vuldb.com/vuln/360817/cti","name":"VDB-360817 | CTI Indicators (IOB, IOC, TTP, IOA)","tags":["signature","permissions-required"]},{"url":"https://vuldb.com/submit/799263","name":"Submit #799263 | sgl-project sglang <=0.5.9 Protection Mechanism Failure","tags":["third-party-advisory"]},{"url":"https://github.com/gouldnicholas/CVE-2026-7669-PoC","tags":["exploit"]}],"metrics":[{"cvssV4_0":{"version":"4.0","baseScore":6.3,"vectorString":"CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:X","baseSeverity":"MEDIUM"}},{"cvssV3_1":{"version":"3.1","baseScore":5.6,"vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R","baseSeverity":"MEDIUM"}},{"cvssV3_0":{"version":"3.0","baseScore":5.6,"vectorString":"CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R","baseSeverity":"MEDIUM"}},{"cvssV2_0":{"version":"2.0","baseScore":5.1,"vectorString":"AV:N/AC:H/Au:N/C:P/I:P/A:P/E:POC/RL:ND/RC:UR"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-94","type":"CWE","lang":"en","description":"Code Injection"}]},{"descriptions":[{"cweId":"CWE-74","type":"CWE","lang":"en","description":"Injection"}]}],"providerMetadata":{"shortName":"VulDB","orgId":"1af790b2-7ee1-4545-860a-a788eba489b5","dateUpdated":"2026-05-04T04:21:53.695Z"},"timeline":[{"time":"2026-04-07T02:00:00.000Z","lang":"en","value":"Vulnerability found"},{"time":"2026-04-07T02:00:00.000Z","lang":"en","value":"Vendor informed"},{"time":"2026-05-02T00:00:00.000Z","lang":"en","value":"Advisory disclosed"},{"time":"2026-05-02T02:00:00.000Z","lang":"en","value":"VulDB entry created"},{"time":"2026-05-03T02:00:00.000Z","lang":"en","value":"Exploit disclosed"},{"time":"2026-05-04T06:26:28.000Z","lang":"en","value":"VulDB entry last update"}],"credits":[{"lang":"en","value":"Nicholas Gould","type":"finder"},{"lang":"en","value":"David Rochester","type":"finder"},{"lang":"en","value":"ngould (VulDB User)","type":"reporter"},{"lang":"en","value":"ngould (VulDB User)","type":"analyst"},{"lang":"en","value":"VulDB CNA Team","type":"coordinator"}]},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-05-05T00:31:25.310003Z","id":"CVE-2026-7669","options":[{"Exploitation":"poc"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-05-05T00:31:40.051Z"}}]}}}