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VulnerabilityPublished

CVE-2026-105777: GitLab · Insertion of Sensitive Information Into Sent Data

Affects GitLabSource CVE Database V5

0

Not known to be exploited · CVSS 4.3 Medium · fixed in 19.5.1 : update GitLab when convenient.

Data as of 26 Oct 2026, 14:18 UTC

CVSS 3.1 base score
4.3Medium
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.2% chance of exploitation in 30 days – higher than 16% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch
Available – fixed in 19.5.1, 19.4.3, 19.3.6
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 21 Oct 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponised: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.

What to do

Upgrade GitLab to 19.5.1, 19.4.3 or 19.3.6.

Affected software

ProductAffectedFixed in
GitLabGitLabAffected
  • >=19.5 <19.5.1
Fixed in
  • 19.5.1
GitLabGitLabAffected
  • >=19.4 <19.4.3
Fixed in
  • 19.4.3
GitLabGitLabAffected
  • >=17.6.5 <19.3.6
Fixed in
  • 19.3.6

CPE configurations (1)

  • cpe:2.3:a:gitlab:gitlab:*:*:*:*:*:*:*:*

Description

GitLab has remediated an issue in GitLab CE/EE affecting all versions from 17.6.5 before 19.3.6, 19.4 before 19.4.3, and 19.5 before 19.5.1 that, under certain conditions, an unauthenticated user could have retrieved sensitive internal server credentials due to improper filtering of internal response headers.

References

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