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Fencer Vulns
low 3.5

CVE-2023-3906 json

Improper Validation of Specified Type of Input in GitLab

published 2023-09-29 3 y ago modified 2026-09-08 2 mo ago also BIT-gitlab-2023-3906 , EUVD-2023-44532

cvss
3.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.6%
EPSS 0.6% chance of exploitation in 30 days, percentile 47%
public exploits
0
none known

Summary

An input validation issue in the asset proxy in GitLab EE, affecting all versions from 12.3 prior to 16.2.8, 16.3 prior to 16.3.5, and 16.4 prior to 16.4.1, allowed an authenticated attacker to craft image urls which bypass the asset proxy.

Patch / fix

  • bitnami gitlab 16.2.8, 16.3.5, 16.4.1
  • GitLab GitLab 16.2.8, 16.3.5, 16.4.1

CISA SSVC

Exploitation
Proof of concept is public
Automatable
no
Technical impact
partial
Assessed
2 y ago

Exploit prediction

0.57% chance of exploitation in the next 30 days, higher than 47% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • hackerone.com https://hackerone.com/reports/2071411 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CNA 3.1 3.5 CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:N/A:N
NVD 3.1 3.5 CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:N/A:N
OSV 3.1 3.5 CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:N/A:N

Affected packages

ecosystem package affected fixed in
bitnami gitlab
>=12.3.0, <16.2.8
>=16.3.0, <16.3.5
>=16.4.0, <16.4.1
16.2.8
16.3.5
16.4.1

Affected products

  • GitLab GitLab

Classification

Weakness
  • CWE-1287 Improper Validation of Specified Type of Input
Technology feeds

References

Sources

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.

CPEs and fixed versions use Anchore's correction of NVD's data: Enhance with deb and rpm package type records.