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Fencer Intel
medium 4.6

CVE-2026-100755 json

Acceptance of Extraneous Untrusted Data With Trusted Data in GitLab

published 28d ago modified 24d ago also BIT-gitlab-2026-100755 , EUVD-2026-98211

cvss
4.6
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.1%
EPSS 0.1% chance of exploitation in 30 days, percentile 0%
public exploits
0
none known

Summary

GitLab has remediated an issue in GitLab CE/EE affecting all versions from 16.2 before 19.2.8, 19.3 before 19.3.5, and 19.4 before 19.4.2 that, under certain deployment configurations, could have allowed an authenticated user to poison cached page content served to other users due to improper cache key construction.

Patch / fix

  • bitnami gitlab 19.2.8, 19.3.5, 19.4.2
  • GitLab GitLab 19.2.8, 19.3.5, 19.4.2

Is CVE-2026-100755 in your dependencies? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

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CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
26d ago

Exploit prediction

0.09% chance of exploitation in the next 30 days, higher than 0% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
CNA 3.1 4.6 CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:L/I:L/A:L
OSV 3.1 4.6 CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:L/I:L/A:L

Affected packages

ecosystem package affected fixed in
bitnami gitlab
>=16.2.0, <19.2.8
>=19.3.0, <19.3.5
>=19.4.0, <19.4.2
19.2.8
19.3.5
19.4.2

Affected products

  • GitLab GitLab

Classification

Weakness
  • CWE-349 Acceptance of Extraneous Untrusted Data With Trusted Data
Technology feeds

References

Sources

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.