CVE-2017-17536

Severity: high (CVSS 8.8 v3.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 2.0% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2017-12-11 · updated 2026-06-17

Description

Phabricator before 2017-11-10 does not block the --config and --debugger flags to the Mercurial hg program, which allows remote attackers to execute arbitrary code by using the web UI to browse a branch whose name begins with a --config= or --debugger= substring.

Affected products

Phacility Phabricator: before 2017-11-10 — fixed in 2017-11-10

How to fix

Upgrade to a fixed version: Phacility Phabricator 2017-11-10. Check the vendor advisory for mitigations.

References

https://hackerone.com/reports/288704
https://secure.phabricator.com/T13012
https://hackerone.com/reports/288704
https://secure.phabricator.com/T13012

Get alerted when CVE-2017-17536 or the next vulnerability affects your stack