CVE-2019-18837 json
An issue was discovered in crun before 0.10.5.
published 2019-11-13 6 y ago modified 2026-06-17 4 mo ago also EUVD-2019-8538
- cvss
- 8.6
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 1.4%
- EPSS 1.4% chance of exploitation in 30 days, percentile 72%
- public exploits
- 0
- none known
Summary
An issue was discovered in crun before 0.10.5. With a crafted image, it doesn't correctly check whether a target is a symlink, resulting in access to files outside of the container. This occurs in libcrun/linux.c and libcrun/chroot_realpath.c.
Patch / fix
- crun_project crun 0.10.5
- github.com/containers/crun#173 pull request
- github.com/containers/crun/releases/tag/0.10.5 release
Exploit prediction
1.42% chance of exploitation in the next 30 days, higher than 72% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.1 | 8.6 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N |
| NVD | 2.0 | 5.0 | AV:N/AC:L/Au:N/C:P/I:N/A:N |
Affected products
- crun crun
Classification
- Weakness
-
- CWE-59 Improper Link Resolution Before File Access
References
- github.com /containers/crun/pull/173
- github.com /containers/crun/releases/tag/0.10.5
- lists.fedoraproject.org /archives/list/package-announce%40lists.fedoraproject.org/message/ITB2UNEGHXZUR3ATYHWPSK5LJB36N7AP/
- lists.fedoraproject.org /archives/list/package-announce%40lists.fedoraproject.org/message/DTA5SJUAKQUK6HRY2CZVJUIZP5BO3EOG/
Sources
- CVE List CVE-2019-18837
- NVD CVE-2019-18837
Fencer Vulns 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.