Transmission 4.0.0‑4.1.2 版本寬容 CORS 漏洞洩露 RPC Anti‑CSRF Token (CVE‑2026‑116748)
CVE-2026-116748 - Transmission 4.0.0 before 4.1.3 Permissive CORS Leaks RPC Anti-CSRF Token
Transmission 4.0.0‑4.1.2 版本存在寬容 CORS 漏洞，可洩露 RPC anti‑CSRF token，允許惡意網頁傳送任意 RPC 呼叫。
此漏洞允許惡意網頁竊取 anti‑CSRF token，易被利用進行遠端命令執行，提醒使用者升級至 4.1.3 或更高版本以修補，並確認 CORS 政策已嚴格限制。
Transmission 4.0.0 before 4.1.3 contains a permissive CORS vulnerability in handle_request() in rpc-server.cc that exposes the X-Transmission-Session-Id anti-CSRF token to any web origin. Malicious web pages can read the token from the 409 handshake response and replay it to issue RPC calls, enabling script-torrent-done execution, download-dir changes, or torrent and data deletion.
Impact
Affected Products
The following products are affected by CVE-2026-116748
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
| ID | Vendor | Product | Action |
|---|---|---|---|
| 1 | Transmissionbt | transmission |
The Common Vulnerability Scoring System is a standardized framework for assessing the severity of vulnerabilities in software and systems. We collect and displays CVSS scores from various sources for each CVE.
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | HIGH | 83251b91-4cc7-4094-a5c7-464a1b83ea10 | ||||
| CVSS 3.1 | HIGH | [email protected] | ||||
| CVSS 4.0 | HIGH | 83251b91-4cc7-4094-a5c7-464a1b83ea10 | ||||
| CVSS 4.0 | HIGH | [email protected] |
Update Transmission to version 4.1.3 or later to fix a permissive CORS vulnerability.
- Update Transmission to version 4.1.3 or later.
- Ensure CORS policy is strictly enforced.
- Review and validate RPC authentication mechanisms.
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-116748.
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-116748 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-116748
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-116748 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-116748 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
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New CVE Received by [email protected]
十月. 26, 2026
Action Type Old Value New Value Added Description Transmission 4.0.0 before 4.1.3 contains a permissive CORS vulnerability in handle_request() in rpc-server.cc that exposes the X-Transmission-Session-Id anti-CSRF token to any web origin. Malicious web pages can read the token from the 409 handshake response and replay it to issue RPC calls, enabling script-torrent-done execution, download-dir changes, or torrent and data deletion. Added CVSS V4.0 AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X Added CVSS V3.1 AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H Added CWE CWE-942 Added Affected New affected value received. <a href="https://github.com/CVEProject/cvelistV5/blob/main/cves/2026/116xxx/CVE-2026-116748.json">CVE-2026-116748</a> Added Reference https://github.com/transmission/transmission Added Reference https://github.com/transmission/transmission/blob/4.1.2/libtransmission/rpc-server.cc#L560 Added Reference https://github.com/transmission/transmission/commit/c6a1bd2017a0fea9c956737c213f23e4b0f7929e Added Reference https://github.com/transmission/transmission/pull/8938 Added Reference https://github.com/transmission/transmission/releases/tag/4.1.3 Added Reference https://joshua.hu/transmission-cors-rpc-csrf-rce-drive-by-exploit Added Reference https://www.vulncheck.com/advisories/transmission-4.0.0-before-4.1.3-permissive-cors-leaks-rpc-anti-csrf-token
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.