CVE-2026-48795 is a high-severity security vulnerability in @adonisjs/bodyparser (npm), affecting versions >= 10.1.3, <= 10.1.4. It is fixed in 10.1.5, 11.0.3.
Summary The fix for GHSA-f5x2-vj4h-vg4c / CVE-2026-25754 introduced in commit 40e1c71 is incomplete and can be bypassed through nested prototype pollution payloads. The original patch replaced the internal FormFields storage object with Object.create(null), preventing direct payloads such as proto.polluted. However, payloads containing a non-dangerous segment before proto or constructor.prototype, such as user.proto.polluted, still lead to Object.prototype pollution. This issue is exploitable remotely through a single unauthenticated multipart/form-data request using the default configuration. Affected versions >= 10.1.3 < 10.1.5 >= 11.0.0-next.9 < 11.0.3 Details The regression tests added by the original fix only covered direct payloads such as: proto.polluted constructor.prototype.polluted These payloads are blocked because the root object no longer inherits from Object.prototype. However, lodash _.set() (via @poppinss/utils) still creates intermediate objects using plain {} values. Once a normal segment is encountered, subsequent proto or constructor.prototype segments regain access to Object.prototype. Impact An unauthenticated attacker can remotely pollute Object.prototype on any route accepting multipart/form-data requests behind BodyParserMiddleware. Because the pollution is process-wide, the impact may include authorization bypasses, unexpected behavior in downstream libraries, or prototype pollution gadget chains leading to remote code execution. Patches Fixes targeting v6 and v7 have been published below. Users should upgrade to a version that includes the following fix: https://github.com/adonisjs/bodyparser/releases/tag/v10.1.5 https://github.com/adonisjs/bodyparser/releases/tag/v11.0.3 References CWE-1321 Prior advisory this bypasses: GHSA-f5x2-vj4h-vg4c / CVE-2026-25754
CVE-2026-48795 has a CVSS score of 8.6 (High). The vector is network-reachable, no privileges required, and no user interaction. A CVSS score reflects the worst-case severity of the vulnerability, not your specific exposure. Whether this affects your application depends on whether the vulnerable code is present and reachable in your environment.
A fixed version is available (10.1.5, 11.0.3). Upgrading removes the vulnerable code path.
npm
@adonisjs/bodyparser (>= 10.1.3, <= 10.1.4)@adonisjs/bodyparser (>= 11.0.0-next.9, <= 11.0.1)@adonisjs/bodyparser → 10.1.5 (npm)@adonisjs/bodyparser → 11.0.3 (npm)Severity tells you how bad this could be in the worst case. It does not tell you whether you are exposed. Exploitability and impact are functions of runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A vulnerable package can sit in your dependency tree and never run.
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Already deployed Kodem? See CVE-2026-48795 in your environment →Upgrade the following packages to resolve this vulnerability:
@adonisjs/bodyparser to 10.1.5 or later@adonisjs/bodyparser to 11.0.3 or laterKodem Kai can prioritize this vulnerability in your dependency tree and generate a fix recommendation.
CVE-2026-48795 is a high-severity security vulnerability in @adonisjs/bodyparser (npm), affecting versions >= 10.1.3, <= 10.1.4. It is fixed in 10.1.5, 11.0.3.
CVE-2026-48795 has a CVSS score of 8.6 (High). This score reflects the worst-case severity of the vulnerability, not your specific exposure. Whether it represents real risk in your environment depends on whether the vulnerable code is present and reachable.
@adonisjs/bodyparser (npm) versions >= 10.1.3, <= 10.1.4 is affected.
Yes. CVE-2026-48795 is fixed in 10.1.5, 11.0.3. Upgrade to this version or later.
Whether CVE-2026-48795 is exploitable in your environment depends on whether the vulnerable code is present and reachable. A CVSS score is a worst-case rating; it does not account for your specific deployment, configuration, or usage patterns. Kodem, an Intelligent Application Security platform, uses runtime intelligence to show which vulnerabilities actually execute in production, so you can focus on the ones that represent real risk. Get a demo
Exploitability and impact are not fixed properties of a CVE. They depend on runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A high CVSS score on a dependency that never runs is not the same as real risk. Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter.
@adonisjs/bodyparser to 10.1.5 or later@adonisjs/bodyparser to 11.0.3 or later