CVE-2026-5760 | sglang 0.59 Reranking Endpoint /v1/rerank jinja2.Environment special elements used in a template engine

VDB-358302 · CVE-2026-5760 · GCVE-0-2026-5760 SGLANG 0.59 RERANKING ENDPOINT /V1/RERANK JINJA2.ENVIRONMENT SPECIAL ELEMENTS USED IN A TEMPLATE ENGINE HISTORYDIFFRELATEJSONXMLCTI CVSS Meta Temp Score Current Exploit Price (≈) CTI Interest Score 6.1 $0-$5k 2.07+ Summaryinfo A vulnerability classified as critical was found in sglang 0.59. Affected is the function jinja2.Environment of the file /v1/rerank of the component Reranking Endpoint. The manipulation results in improper neutralization of special elements used in a template engine. This vulnerability is reported as CVE-2026-5760. The attack can be launched remotely. No exploit exists. Detailsinfo A vulnerability, which was classified as critical, was found in sglang 0.59. Affected is the function jinja2.Environment of the file /v1/rerank of the component Reranking Endpoint. The manipulation with an unknown input leads to a improper neutralization of special elements used in a template engine vulnerability. CWE is classifying the issue as CWE-1336. The product uses a template engine to insert or process externally-influenced input, but it does not neutralize or incorrectly neutralizes special elements or syntax that can be interpreted as template expressions or other code directives when processed by the engine. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes: 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(). The advisory is available at github.com. This vulnerability is traded as CVE-2026-5760 since 04/07/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. Technical details are known, but there is no available exploit. The structure of the vulnerability defines a possible price range of USD $0-$5k at the moment (estimation calculated on 04/20/2026). This vulnerability is assigned to T1221 by the MITRE ATT&CK project. There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product. Productinfo Name sglang Version 0.59 CPE 2.3info 🔒 CPE 2.2info 🔒 CVSSv4info VulDB Vector: 🔒 VulDB Reliability: 🔍 CVSSv3info VulDB Meta Base Score: 6.3 VulDB Meta Temp Score: 6.1 VulDB Base Score: 6.3 VulDB Temp Score: 6.1 VulDB Vector: 🔒 VulDB Reliability: 🔍 CVSSv2info Vector Complexity Authentication Confidentiality Integrity Availability Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock VulDB Base Score: 🔒 VulDB Temp Score: 🔒 VulDB Reliability: 🔍 Exploitinginfo Class: Improper neutralization of special elements used in a template engine CWE: CWE-1336 / CWE-791 / CWE-790 CAPEC: 🔒 ATT&CK: 🔒 Physical: No Local: No Remote: Yes Availability: 🔒 Status: Not defined Price Prediction: 🔍 Current Price Estimation: 🔒 0-Day Unlock Unlock Unlock Unlock Today Unlock Unlock Unlock Unlock Threat Intelligenceinfo Interest: 🔍 Active Actors: 🔍 Active APT Groups: 🔍 Countermeasuresinfo Recommended: no mitigation known Status: 🔍 0-Day Time: 🔒 Timelineinfo 04/07/2026 CVE reserved 04/20/2026 +13 days Advisory disclosed 04/20/2026 +0 days VulDB entry created 04/20/2026 +0 days VulDB entry last update Sourcesinfo Advisory: github.com Status: Not defined CVE: CVE-2026-5760 (🔒) GCVE (CVE): GCVE-0-2026-5760 GCVE (VulDB): GCVE-100-358302 Entryinfo Created: 04/20/2026 16:49 Changes: 04/20/2026 16:49 (53) Complete: 🔍 Cache ID: 99:BFC:101 Discussion No comments yet. Languages: en. Please log in to comment. ◂ PreviousOverviewNext ▸