CVE-2017-17536

high

Published 2017-12-11 · Modified 2026-05-13

CVSS v3

8.8

CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

CVSS v2

6.8

VIR risk

8.8

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.

Predictions

Exploit likelihood

92%

Patch ETA

—

Heuristic predictions, AS-IS, for prioritization only.

Mitigations

vendor Authored 2026-05-27

Vendor advisory: debian — https://security-tracker.debian.org/tracker/CVE-2017-17536

vendor Authored 2026-05-27

Vendor advisory: cve@mitre.org — https://secure.phabricator.com/T13012

OS impact

OS	Version	Status	Fixed in
debian	bookworm	affected
debian	bullseye	affected

Application impact

Vendor	Product	Versions	Fixed
phacility	phabricator	`{"endExcluding":"2017-11-10"}`	`2017-11-10`

References

https://hackerone.com/reports/288704
https://secure.phabricator.com/T13012
https://security-tracker.debian.org/tracker/CVE-2017-17536

Verify integrity in audit chain (admin only). AS-IS.