GHSA-rx7m-68vc-ppxh: phpoffice/phpspreadsheet (CVE-2025-54370)

Package	Ecosystem	Affected	Fixed in
phpoffice/phpspreadsheet	Packagist	<1.30.0 \|\| >=2.0.0, <2.1.12 \|\| >=2.2.0, <2.4.0 \|\| >=3.0.0, <3.10.0 \|\| >=4.0.0, <5.0.0	1.30.0, 2.1.12, 2.4.0, 3.10.0, 5.0.0

Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

PhpSpreadsheet versions before 1.30.0, from 2.0.0 before 2.1.12, from 2.2.0 before 2.4.0, from 3.0.0 before 3.10.0, and from 4.0.0 before 5.0.0 are vulnerable to server-side request forgery when a string from a user is passed to the HTML reader and the processed document is displayed in a browser. An attacker who can supply that string can make the server send requests to addresses of their choosing. The source also mentions a possible phar deserialization opportunity but gives few details. Upgrade to 1.30.0, 2.1.12, 2.4.0, 3.10.0, or 5.0.0 depending on your release line.

Written 3 Nov 2026.

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

Score	Rating	CVSS	Vector	Source
8.7	High	4.0	CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N	CNA (GitHub_M)

CISA KEV Not listed.
EPSS 0.0082, the 57th percentile, on 15 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

31 Oct 2026, 14:26 UTC First seen by agentprime
31 Oct 2026, 14:26 UTC Confirmed by OSV

Sources

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.