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CVE-2026-58225— SQL injection via unescaped dollar-quote in Postgrex.Notifications reconnect replay causes notification denial of service

Quick assessment

Affected
elixir-ecto postgrex
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

elixir-ecto postgrex是elixir-ecto团队的数据库驱动程序。 elixir-ecto postgrex 0.16.0版本至0.22.3之前版本存在SQL注入漏洞，该漏洞源于对LISTEN通道名称的SQL注入，可能导致攻击者影响重新连接重放查询，造成通知连接拒绝服务。

AI Predicted 7.5 Difficulty: Easy EPSS 0.22% · P12

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service

Affected Version Matrix 2

VendorProduct Version RangeStatus
elixir-ecto postgrex 0.16.0< 0.22.3 affected
266b530faf9bde094e31e0e4ab851f933fadc0f5< 795c6062f62c4394272ff4b89170688857b4f841 affected
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I. Basic Information for CVE-2026-58225

Vulnerability Information
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Vulnerability Title
SQL injection via unescaped dollar-quote in Postgrex.Notifications reconnect replay causes notification denial of service
Source: CVE Program / CVE List V5
Vulnerability Description
SQL Injection vulnerability in elixir-ecto postgrex allows an attacker who can influence a LISTEN channel name to inject SQL into the reconnect replay query, causing a denial of service of the notification connection. Postgrex.Notifications sanitizes channel names with quote_channel/1, which doubles double quotes so the name is safe inside a double-quoted identifier. This protects the single-statement LISTEN and UNLISTEN paths. On every (re)connect, however, handle_connect/1 replays all registered channels at once by concatenating their LISTEN statements and wrapping them in a dollar-quoted anonymous code block (DO $$BEGIN ... END$$). quote_channel/1 does not escape the $$ dollar-quote delimiter that opens and closes this block. The listen/3 guards only reject null bytes and names longer than 63 bytes, so a channel name containing $$ passes validation unchanged. Once such a name is embedded, its $$ prematurely terminates the outer dollar-quoted string and PostgreSQL parses the remainder as additional top-level statements. Because handle_connect/1 runs on every (re)connect, the malformed replay query is rejected each time and the notification connection never re-establishes its subscriptions, silently dropping notifications for every channel sharing that connection. An application is affected when it passes untrusted input (for example a tenant or user identifier) as a channel name to Postgrex.Notifications.listen/3. The double-quote doubling prevents forming a fully valid injected statement, so arbitrary SQL execution is not possible, but the corrupted query reliably breaks the shared notification connection for all tenants, resulting in denial of service. This issue affects postgrex: from 0.16.0 before 0.22.3.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
SQL命令中使用的特殊元素转义处理不恰当(SQL注入)
Source: CVE Program / CVE List V5
Vulnerability Title
elixir-ecto postgrex SQL注入漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
elixir-ecto postgrex是elixir-ecto团队的数据库驱动程序。 elixir-ecto postgrex 0.16.0版本至0.22.3之前版本存在SQL注入漏洞，该漏洞源于对LISTEN通道名称的SQL注入，可能导致攻击者影响重新连接重放查询，造成通知连接拒绝服务。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
elixir-ecto postgrex 0.16.0 ~ 0.22.3 cpe:2.3:a:elixir-ecto:postgrex:*:*:*:*:*:*:*:*
elixir-ecto postgrex 266b530faf9bde094e31e0e4ab851f933fadc0f5 ~ 795c6062f62c4394272ff4b89170688857b4f841 cpe:2.3:a:elixir-ecto:postgrex:*:*:*:*:*:*:*:*

II. Public POCs for CVE-2026-58225

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III. Intelligence Information for CVE-2026-58225

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Patches & Fixes for CVE-2026-58225 (1)

Vendor Advisories for CVE-2026-58225 (3)

IV. Related Vulnerabilities

Same product: postgrex
Same vendor: elixir-ecto
Same weakness: CWE-89

V. Comments for CVE-2026-58225

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