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CVE-2026-100755

Acceptance of Extraneous Untrusted Data With Trusted Data in GitLab

CVSS score

4.6

EPSS probability

—

Risk score

0.5

Published

7 h ago

OverviewPublic Exploits (0)NewsroomVulnerability Timeline
Patch status has not yet been verified

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Impact on My Inventory

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Vulnerability description

CVE AI research

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DayBreach AI Explanation

Verified against sources

Cache Key Construction Flaw in GitLab

Sources read

2

Source agreement

Tam uyum

Evidence confidence

%63

Short explanation

Affecting GitLab CE and EE, CVE-2026-100755 under certain deployment configurations could allow an authenticated user to poison cached page content served to other users due to improper cache key construction.

Why does it matter?

This vulnerability allows authenticated attackers under specific configurations to manipulate cached page content, potentially compromising user sessions and data integrity.

What should be done?

  • Follow vendor advisories
  • Review patch information released for affected versions
  • Examine your deployment configuration settings
Chain of evidence and sources2 verified claims

CVE-2026-100755, GitLab CE/EE sürümlerinde 16.2 ile 19.2.8 öncesi, 19.3 ile 19.3.5 öncesi ve 19.4 ile 19.4.2 öncesi sürümleri etkilemektedir.

S0 · daybreach-canonicalS1 · cvelistS2 · nvd

Zafiyet, uygunsuz önbellek anahtarı oluşturulması nedeniyle kimliği doğrulanmış bir kullanıcının önbelleğe alınmış sayfa içeriğini zehirlemesine yol açabilir.

S0 · daybreach-canonicalS1 · cvelistS2 · nvd
Show the technical text from the sources

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.

CVSS vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:L/I:L/A:L

CWE: CWE-349

Explanation produced with the local gemini-flash-lite-latest model. Numerical metrics and the KEV, patch and exploit statuses are not determined by AI.

IMPACT: Affected Products and Software

Affected Products

The following products are affected by CVE-2026-100755 vulnerability. Where our threat engine knows the exact affected versions, they are listed below.

IDVENDORPRODUCTACTION
1gitlabgitlab View
Total affected vendors: 1|Products: 1

RED HAT CSAF/VEX: Product Impact Check

Red Hat has not yet published a CSAF/VEX impact record for this CVE. This does not mean “not affected”.

SCORING: CVSS from Multiple Sources

CVSS Scores

The Common Vulnerability Scoring System is a standardised framework for assessing the severity of vulnerabilities in software and systems. We collect and display CVSS scores from several sources for each CVE.

SCOREVERSIONSEVERITYVECTORSOURCE
4.6CVSS V31MEDIUMCVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:L/I:L/A:LNVD
4.6CVSS V3_1MEDIUMCVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:L/I:L/A:LCVE CNA

Patch and Remediation Guide

Solution & Remediation Advisory

Patch status unknown

İncelenen resmî kaynaklarda yama durumu doğrulanamadı. Bu sonuç “yama yok” anlamına gelmez.

Confirm the affected product and version against the source evidence above.
Restrict access to internet-facing services and apply network segmentation.
Until a patch is confirmed, follow the vendor advisory; do not read an unknown status as “no patch”.
Monitor server logs and network endpoints for signs of anomalous execution.

Public exploit and active exploitation status

Verified exploit intelligence

No verified public PoC, exploit repository or Metasploit module has been found for this CVE yet.

Weakness Classification and Attack Patterns (CWE & CAPEC)

CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorises the common flaws or weaknesses that can lead to vulnerabilities. CVE-2026-100755 is associated with the following CWEs:

CWE-349: Common Weakness Enumeration Entry CWE-349

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2026-100755 weaknesses.

CAPEC-66: SQL InjectionCAPEC-126: Path TraversalCAPEC-28: OS Command Injection

Attack Vector and Accessibility

ExposureAğ üzerinden
PermissionsLow
UserGerekiyor

Official Sources and Advisories

https://gitlab.com/gitlab-org/gitlab/-/work_items/627507vendor-advisoryhttps://docs.gitlab.com/releases/patches/patch-release-gitlab-19-4-2-released/vendor-advisory

CVSS Vector Radar Chart

4.6 / 10
Attack VectorNetworkComplexityHighPrivilegesLowUser Interact.RequiredConfidentialityHighIntegrityLowAvailabilityLow

Vulnerability Scoring Details

CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:L/I:L/A:L
Attack VectorNetwork
Attack ComplexityHigh
Privileges RequiredLow privileges
User Interaction—
Confidentiality (Gizlilik)High
Integrity (Bütünlük)Low
Availability (Erişilebilirlik)Low

Yama durumu bilinmiyor

İncelenen resmî kaynaklarda yama durumu doğrulanamadı. Bu sonuç “yama yok” anlamına gelmez.

Follow the vendor

G
gitlab logo
gitlab

Weakness Type (CWE & CAPEC)

CWE-349

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