GHSA-f8ff-652m-j5rx: yourls/yourls (CVE-2026-62858)

Package	Ecosystem	Affected	Fixed in
yourls/yourls	Packagist	<1.10.5	1.10.5

Machine-written summary

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

YOURLS versions 1.10.4 and earlier (affected below 1.10.5) contain an unauthenticated path traversal flaw that lets an attacker include and execute arbitrary PHP files on the server. An attacker needs no credentials, but must first place a PHP file somewhere on the server through another means, such as a separate upload feature or code injection; they can then cause YOURLS to run it. The fix is to upgrade to YOURLS 1.10.5.

Written 31 Oct 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
5.3	Medium	3.1	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L	CNA (GitHub_M)

CISA KEV Not listed.
EPSS 0.0047, the 40th percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

31 Oct 2026, 13:53 UTC First seen by agentprime
31 Oct 2026, 13:53 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.