CVE-2018-3779 json
active-support impersonates 'activesupport' gem
published 2018-08-10 8 y ago modified 2026-06-17 4 mo ago also GHSA-2j55-pcw5-x4h2 , EUVD-2018-0352
- cvss
- 9.8
- version 3.0, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 6.5%
- EPSS 6.5% chance of exploitation in 30 days, percentile 93%
- public exploits
- 0
- none known
Summary
active-support ruby gem 5.2.0 could allow a remote attacker to execute arbitrary code on the system, caused by containing a malicious backdoor. An attacker could exploit this vulnerability to execute arbitrary code on the system.
Exploit prediction
6.48% chance of exploitation in the next 30 days, higher than 93% of all scored CVEs (FIRST EPSS, 2026-11-09).
Exploits and checks
- hackerone.com https://hackerone.com/reports/392311 referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.0 | 9.8 | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| NVD | 2.0 | 10.0 | AV:N/AC:L/Au:N/C:C/I:C/A:C |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| rubygems | active-support | all versions |
no fix listed |
Affected products
- HackerOne active-support ruby gem
Classification
- Weakness
-
- CWE-77 Improper Neutralization of Special Elements used in a Command
References
-
hackerone.com
/reports/392311
web, exploit, issue-tracking, third-party-advisory
-
nvd.nist.gov
/vuln/detail/CVE-2018-3779
advisory
-
github.com
/advisories/GHSA-2j55-pcw5-x4h2
advisory
Sources
- CVE List CVE-2018-3779
- GitHub Advisory GHSA-2j55-pcw5-x4h2
- NVD CVE-2018-3779
Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.