CVE-2026-55198

Hermes WebUI < 0.51.443 - Cross-Profile Session Data Exfiltration via Session Export Endpoint

Hermes WebUI before 0.51.443 contains an authorization bypass vulnerability in the session export endpoint that allows authenticated users to access sessions from other profiles. The _handle_session_export handler in api/routes.py fails to verify active-profile ownership before serializing session data, enabling attackers to exfiltrate foreign session transcripts by guessing or knowing session identifiers.

CVSS 4.0 · 7.1 High EPSS < 1% KEV · Not listed

Vendors

Get-hermes Nesquena

Products

Hermes Web Ui Hermes-webui

CVE-2026-55197

Hermes WebUI < 0.51.443 - Broken Access Control in /api/session Endpoint

Hermes WebUI before 0.51.443 contains a broken access control vulnerability in the /api/session endpoint that allows authenticated users to disclose cross-profile session transcripts. Attackers can bypass profile boundary checks by directly querying session IDs belonging to other profiles via GET /api/session?session_id=<foreign_id>&messages=1 to retrieve unauthorized conversation transcripts and metadata.

CVSS 4.0 · 7.1 High EPSS < 1% KEV · Not listed

Vendors

Get-hermes Nesquena

Products

Hermes Web Ui Hermes-webui

CVE-2026-55196

Hermes WebUI < 0.51.409 - Unauthenticated Passkey Registration via Authentication Bypass

Hermes WebUI before 0.51.409 contains an authentication bypass vulnerability in passkey registration endpoints that allows unauthenticated remote attackers to register arbitrary passkeys. When HERMES_WEBUI_PASSKEY=1 is enabled with no existing credentials, POST /api/auth/passkey/register/options and POST /api/auth/passkey/register endpoints are accessible without authentication, allowing attackers to claim the first passkey and gain permanent administrative control.

CVSS 4.0 · 9.1 Critical EPSS < 1% KEV · Not listed

Vendors

Get-hermes Hermes-webui

Products

Hermes Web Ui Hermes-webui

CVE-2026-54388

Tinyproxy - HTTP Request Smuggling via Duplicate Content-Length Headers

Tinyproxy through 1.11.3, fixed in commit 364cdb6, fails to reject requests containing multiple Content-Length headers with differing values, forwarding all duplicate headers to the backend while using the first value to determine how many request body bytes to consume. Remote attackers can desynchronize the proxy and backend parser state, allowing injection of arbitrary HTTP requests to the backend to enable cache poisoning, access control bypass, and request hijacking.

CVSS 4.0 · 9.3 Critical EPSS < 1% KEV · Not listed

Vendors

Tinyproxy Tinyproxy Project

Products

Tinyproxy Tinyproxy

CVE-2026-54387

Tinyproxy - HTTP Request Smuggling via CL/TE Desynchronization

Tinyproxy through 1.11.3, fixed in commit ff45d3b, fails to reconcile conflicting Content-Length and Transfer-Encoding: chunked headers, forwarding both verbatim to the backend while using Content-Length to determine how many request body bytes to consume. Remote attackers can desynchronize the proxy and backend parser state, allowing injection of arbitrary HTTP requests to the backend to enable cache poisoning, access control bypass, and request hijacking.

CVSS 4.0 · 9.3 Critical EPSS < 1% KEV · Not listed

Vendors

Tinyproxy Tinyproxy Project

Products

Tinyproxy Tinyproxy

CVE-2026-54386

marimo < 0.23.9 XSS via file Query Parameter in assets.py

marimo before 0.23.9 contains a reflected cross-site scripting vulnerability in the notebook page that allows unauthenticated attackers to inject arbitrary JavaScript by exploiting improper escaping of single quotes in the file query parameter reflected into an inline JavaScript string literal. Attackers can craft a malicious link with a payload beginning with __new__ to bypass the 404 check and inject JavaScript into the page, which executes without Content-Security-Policy restrictions in the origin of a victim's marimo server.

CVSS 4.0 · 5.1 Medium EPSS < 1% KEV · Not listed

Vendors

Coreweave Marimo-team

Products

Marimo Marimo

CVE-2026-54370

acl < 2.4.0 TOCTOU Symlink Traversal via getfacl/setfacl/chacl

acl before version 2.4.0 contains a time-of-check to time-of-use (TOCTOU) race condition vulnerability that allows local attackers to escalate privileges by replacing a pathname component with a symbolic link between an lstat() check and subsequent symlink-following operations such as stat(), chown(), chmod(), acl_get_file(), and acl_set_file(). Attackers who control a pathname component can redirect file access control list operations to arbitrary files when getfacl, setfacl, or chacl is invoked by a privileged process over an attacker-controlled path, resulting in local privilege escalation.

CVSS 4.0 · 7.2 High EPSS < 1% KEV · Not listed

Vendors

Acl Project

Products

Acl

CVE-2026-53871

Hermes WebUI < 0.51.368 - Profile-Scoped Authorization Bypass via Forged hermes_profile Cookie

Hermes WebUI before 0.51.368 contains an authorization bypass vulnerability in the get_profile_cookie() function that accepts unauthenticated profile names from the hermes_profile cookie. An authenticated attacker can forge the hermes_profile cookie value to bypass profile-scoped authorization checks and access sessions, files, and resources across different profiles.

CVSS 4.0 · 8.6 High EPSS < 1% KEV · Not listed

Vendors

Get-hermes Nesquena

Products

Hermes Web Ui Hermes-webui

CVE-2026-53779

WebP Server Go < 0.15.0 Path Traversal via Backslash Encoding on Windows

WebP Server Go through 0.14.4 contains a path traversal vulnerability on Windows that allows unauthenticated attackers to read files outside the configured IMG_PATH directory by sending requests with percent-encoded backslashes (%5C) that bypass the path.Clean() sanitization in handler/router.go. Attackers can exploit the discrepancy between Go's forward-slash-only path normalization and Windows file system APIs that treat backslashes and forward slashes as equivalent to access arbitrary files on the host filesystem accessible to the server process.

CVSS 4.0 · 8.7 High EPSS < 1% KEV · Not listed

Vendors

Webp

Products

Webp Server Go

CVE-2026-49973

Hermes WebUI < 0.51.358 Unauthenticated Password Takeover via /api/settings

Hermes WebUI before version 0.51.358 contains an improper access control vulnerability that allows unauthenticated remote attackers to hijack initial setup by submitting the _set_password parameter to the settings API endpoint without any network origin restriction. Attackers on any reachable network can send a POST request to the settings endpoint during the first-run setup window to persist an arbitrary password hash, obtain a valid session cookie, and lock out the legitimate operator from their own instance.

CVSS 4.0 · 9.2 Critical EPSS < 1% KEV · Not listed

Vendors

Get-hermes Nesquena

Products

Hermes Web Ui Hermes-webui

CVE-2026-49959

Hermes WebUI < 0.51.311 RCE via Git Configuration Injection

Hermes WebUI before version 0.51.311 contains a remote code execution vulnerability that allows authenticated attackers to execute arbitrary commands by placing malicious executable Git configuration in a workspace repository's .git/config file. Attackers can exploit Git subprocess invocations in api/workspace_git.py through vectors such as core.fsmonitor during git status, protocol.ext.allow with ext:: remotes during git fetch, credential.helper, core.askPass, core.gitProxy, or inherited environment variables including GIT_SSH_COMMAND to achieve arbitrary command execution on the host running the application.

CVSS 4.0 · 8.7 High EPSS < 1% KEV · Not listed

Vendors

Get-hermes Nesquena

Products

Hermes Web Ui Hermes-webui

CVE-2026-49958

Hermes WebUI < 0.51.303 TOCTOU Race Condition via git_discard

Hermes WebUI before version 0.51.303 contains a time-of-check time-of-use (TOCTOU) race condition vulnerability in the git_discard function within api/workspace_git.py that allows attackers to delete files outside the configured workspace boundary by replacing a validated path component with a symlink after validation but before deletion. Attackers can substitute a workspace-controlled path component with a symlink pointing to an external directory between the safe_resolve_ws() validation step and the subsequent Path.unlink() or shutil.rmtree() deletion call, causing the delete operation to follow the symlink and remove arbitrary files outside the workspace.

CVSS 4.0 · 4.3 Medium EPSS < 1% KEV · Not listed

Vendors

Get-hermes Nesquena

Products

Hermes Web Ui Hermes-webui

CVE-2026-49957

Hermes WebUI < 0.51.296 Workspace Boundary Bypass via api/workspace.py

Hermes WebUI before version 0.51.296 contains a workspace boundary bypass vulnerability that allows authenticated attackers to circumvent blocked-root path checks by exploiting an early return in the SSH/remote terminal profile workspace resolution logic within _remote_terminal_workspace_candidate(). Attackers can configure a remote terminal working directory to a system directory such as /etc, causing the workspace resolution path to accept it as a trusted local workspace root before the _is_blocked_workspace_path() guard executes, enabling read access to local system files through workspace file-read helpers.

CVSS 4.0 · 6.3 Medium EPSS < 1% KEV · Not listed

Vendors

Get-hermes Nesquena

Products

Hermes Web Ui Hermes-webui

CVE-2026-49956

Hermes WebUI < 0.51.269 Profile Isolation Bypass via sessions search

Hermes WebUI before version 0.51.269 contains a profile isolation bypass vulnerability that allows authenticated users to access data belonging to other profiles by querying the session search endpoint without active-profile filtering. Attackers can send requests to the sessions search handler to retrieve session titles and transcript message content from profiles other than their own active profile.

CVSS 4.0 · 7.1 High EPSS < 1% KEV · Not listed

Vendors

Get-hermes Nesquena

Products

Hermes Web Ui Hermes-webui

CVE-2026-49955

Hermes WebUI < 0.51.270 Resource Exhaustion via passkey/options

Hermes WebUI before version 0.51.270 contains a resource exhaustion vulnerability that allows unauthenticated remote attackers to degrade service availability by repeatedly calling the passkey options endpoint without completing assertion. Attackers can send unlimited POST requests to the authentication endpoint, causing unbounded growth of the challenge store file and excessive CPU and disk I/O through repeated JSON file rewrites.

CVSS 4.0 · 6.9 Medium EPSS < 1% KEV · Not listed

Vendors

Get-hermes Nesquena

Products

Hermes Web Ui Hermes-webui

CVE-2026-49133

Typemill < 2.24.0 Path Traversal via ControllerApiImage::getPagemedia()

Typemill before 2.24.0 contains a path traversal vulnerability that allows authenticated attackers with Author-level privileges to read arbitrary files outside the content directory by supplying traversal sequences in the path query parameter passed to Storage::getFile() with an empty folder argument. Attackers can bypass traversal-prevention controls in Storage::getFolderPath() to access sensitive files.

CVSS 4.0 · 7.1 High EPSS < 1% KEV · Not listed

Vendors

Typemill

Products

Typemill

CVE-2026-49119

Gradio < 6.16.0 Path Traversal via FileExplorer.preprocess()

Gradio before 6.16.0 contain a path traversal vulnerability in the FileExplorer component's preprocess() method that allows unauthenticated attackers to escape the configured root directory by supplying path segments containing directory traversal sequences or absolute paths. Attackers can provide crafted path segments that cause os.path.join to discard the root_dir prefix entirely, resulting in arbitrary file read or exposure of sensitive files outside the intended directory.

CVSS 4.0 · 8.7 High EPSS < 1% KEV · Not listed

Vendors

Gradio-app Gradio Project

Products

Gradio Gradio

CVE-2026-48558

SimpleHelp Authentication Bypass via Missing OIDC JWT Signature Verification

SimpleHelp versions 5.5.15 and prior and 6.0 pre-release versions contain an authentication bypass vulnerability in the OIDC authentication flow. When OIDC authentication is configured, identity tokens submitted during login are accepted without verifying their cryptographic signature. In a vulnerable configuration, a remote, unauthenticated attacker can submit a forged token containing arbitrary identity claims to obtain a fully authenticated technician session. In some configurations, this may also allow bypass of multi-factor authentication. No user interaction is required.

CVSS 4.0 · 9.5 Critical EPSS 80.3% KEV · Listed

Vendors

Simple-help

Products

Simplehelp

CVE-2026-47119

Agent Zero < 1.15 Stored XSS via image_get API Endpoint

Agent Zero before version 1.15 contains a stored cross-site scripting vulnerability that allows attackers to execute arbitrary JavaScript in the application origin by serving SVG files through the image_get API endpoint without Content-Security-Policy, X-Content-Type-Options, or Content-Disposition headers. Attackers can place a crafted SVG file containing script tags in any path readable by the agent-zero process and lure an authenticated user to the image_get endpoint, causing the browser to execute the malicious script, steal the csrf_token cookie, and perform unauthorized API calls on behalf of the victim.

CVSS 4.0 · 5.3 Medium EPSS < 1% KEV · Not listed

Vendors

3clyp50 Agent-zero

Products

Agent-zero Agent-zero

CVE-2026-47118

Agent Zero < 1.15 Path Traversal File Read via image_get API

Agent Zero before version 1.15 contains a path traversal vulnerability that allows unauthenticated attackers to read arbitrary files by supplying crafted paths to the image file serving endpoint, which relies solely on an extension allowlist while the path containment check is explicitly disabled. Attackers can request any file with an image extension readable by the process, including files outside the agent workspace, user home directories, and mounted volumes, and can also leverage symlink-based escapes due to the lack of path canonicalization in the path resolution logic.

CVSS 4.0 · 7.1 High EPSS < 1% KEV · Not listed

Vendors

3clyp50 Agent-zero

Products

Agent-zero Agent-zero