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Fencer Intel
low 3.1

CVE-2023-0508 json

Improper Neutralization of CRLF Sequences in HTTP Headers ('HTTP Request/Response Splitting') in GitLab

published 3y ago modified 2mo ago also BIT-gitlab-2023-0508 , EUVD-2023-12555

cvss
3.1
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.8%
EPSS 0.8% chance of exploitation in 30 days, percentile 55%
public exploits
0
none known

Summary

An issue has been discovered in GitLab CE/EE affecting all versions starting from 15.4 before 15.10.8, all versions starting from 15.11 before 15.11.7, all versions starting from 16.0 before 16.0.2. Open redirection was possible via HTTP response splitting in the NPM package API.

Patch / fix

  • bitnami gitlab 15.10.8, 15.11.7, 16.0.2
  • gitlab gitlab 15.10.8, 15.11.7, 16.0.2
  • gitlab gitlab_enterprise 15.10.8, 15.11.7, 16.0.2

Is CVE-2023-0508 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
Proof of concept is public
Automatable
no
Technical impact
partial
Assessed
last yr.

Exploit prediction

0.76% chance of exploitation in the next 30 days, higher than 55% of all scored CVEs (FIRST EPSS, 2026-11-14).

Exploits and checks

  • gitlab.com https://gitlab.com/gitlab-org/gitlab/-/issues/389328 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CNA 3.1 3.1 CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:N
NVD 3.1 4.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N
OSV 3.1 4.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N

Affected packages

ecosystem package affected fixed in
bitnami gitlab
>=12.9.0, <15.10.8
>=15.11.0, <15.11.7
>=16.0.0, <16.0.2
15.10.8
15.11.7
16.0.2

Affected products

  • GitLab GitLab

Classification

Weakness
  • CWE-113 Improper Neutralization of CRLF Sequences in HTTP Headers
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.

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