Vulnerability in Php-standard-library
CVE-2026-48979
PHP Standard Library (PSL) is set of APIs covering async, collections, networking, I/O, cryptography, terminal UI, etc. In versions 6.1.0, 6.1.1 and 6.2.0, the Psl\H2\ServerConnection does not validate that the total bytes received in DATA…
Vulnerability class: HTTP Request Smuggling
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N.
Affected products
- Php-standard-library — versions >= 6.1.0, < 6.1.2, >= 6.2.0, < 6.2.1
- Php-standard-library Php-standard-library/h2 — versions >= 6.1.0, < 6.1.2, >= 6.2.0, < 6.2.1
Weakness classification (CWE)
References
- security-advisories@github.com (x_refsource_CONFIRM)
- security-advisories@github.com (x_refsource_MISC)
- security-advisories@github.com (x_refsource_MISC)
Frequently asked questions
- What is CVE-2026-48979?
- CVE-2026-48979 is a high-severity vulnerability in Php-standard-library, classified under Inconsistent Interpretation of HTTP Requests (HTTP Request/Response Smuggling). CVSS score: 7.5/10. Published 2026-06-17.
- How severe is CVE-2026-48979?
- High severity. CVSS v3 base score is 7.5 out of 10.