USN-8743-1: PHP vulnerabilities
Ubuntu fixes three PHP flaws, including SQL injection in the PostgreSQL extension (CVE-2026-17543) and an out-of-bounds write in bccomp().
Ubuntu Security Notice USN-8743-1 patches three vulnerabilities in PHP. CVE-2026-17543 involves incorrect backslash escaping in the PostgreSQL extension enabling SQL injection. CVE-2026-17544 is an out-of-bounds write in bccomp() that could cause denial of service or arbitrary code execution on Ubuntu 26.04 LTS, and CVE-2026-7260 causes unbounded recursion via circular symlinks in phar archives.
- CVE-2026-17543: SQL injection via mishandled backslash escaping in PHP PostgreSQL extension
- CVE-2026-17544: out-of-bounds write in bccomp(), may allow DoS or code execution
- CVE-2026-7260: unbounded recursion from circular symlinks in phar archives causes DoS
- Fixes delivered through Ubuntu security update USN-8743-1
- Products
- PHPPostgreSQL extension
Vulnerabilities mentioned
All| CVE | Vulnerability | CVSS | EPSS | Signals | Published |
|---|---|---|---|---|---|
CVE-2026-17544+2 related CVEs | Attacker-provided inputs to bccomp() could lead to an out-of-bounds write with stack and heap corruption in PHP versions from 8.4.* before 8.4.24 and from… | 8.1 group max | <1% |
From the original article
It was discovered that PHP incorrectly handled backslash escaping in the PostgreSQL extension. An attacker could use this issue to perform SQL injection attacks. (CVE-2026-17543) It was discovered that PHP incorrectly handled certain inputs to the bccomp() function.
ubuntu.com
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