9.8

CVE-2018-12026: phusion passenger Link Following

CVSS: 9.8v3.0CriticalModified
AliasesUBUNTU-CVE-2018-12026GHSA-7cv3-gvmc-8mq5
Published 17-06-2018Last modified 05-08-2024
Open JSON

Vulnerability summary

CVE-2018-12026 is a critical (CVSS 9.8) Link Following vulnerability in phusion passenger. EPSS estimates a 1.95% chance of exploitation in the next 30 days, higher than 79.9% of scored vulnerabilities.

Overall risk
70/100
0100
High · default modelHow is this calculated?
CVSS score
9.8/10
010
Critical · v3.0 (NVD)
EPSS score
1.95%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 17-06-2018
    PublishedVulnerability first disclosed.
  2. 05-08-2024
    Last modifiedVulnerability information updated.

Description

During the spawning of a malicious Passenger-managed application, SpawningKit in Phusion Passenger 5.3.x before 5.3.2 allows such applications to replace key files or directories in the spawning communication directory with symlinks. This then could result in arbitrary reads and writes, which in turn can result in information disclosure and privilege escalation.

CVSS metrics

4 scores · 3 sources · 2 versions

EPSS trend

Probability

1.95%

Chance of exploitation in the next 30 days

Percentile

80%

Versus all other CVEs

30-day change

0.00 pp

From 1.95% on 19-09-2026

19-09-202619-10-2026
EPSS score
1.95%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Phusion1 product
RubyGems1 product
  • passenger≥ 5.3.0, < 5.3.2
Ubuntu1 product
  • passenger< 6.0.10-3build1

3 vendors · 3 products

References

10 links