HOMEVULNERABILITIESCVE-2026-1456
MEDIUM

CVE-2026-1456

CWE-770Published: February 11, 2026· Updated: Feb 12, 2026

6.5
CVSS v3.1
EPSS:0.03%probability of exploitation in 30 daysPercentile:7.5th

Official Description

GitLab has remediated an issue in GitLab CE/EE affecting all versions from 18.7 before 18.7.4, and 18.8 before 18.8.4 that could have allowed an unauthenticated user to cause denial of service through CPU exhaustion by submitting specially crafted markdown files that trigger exponential processing in markdown preview.

NVD Source

Technical Analysis

CVE-2026-1456 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

A successful exploit results in availability disruption (denial of service), with a CVSS base score of 6.5.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.Low
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityNone
IntegrityNone
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Affected Vendors & Products

GitLab1 product
gitlab
Source: NVD CPE · 1 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

ADVISORYhttps://about.gitlab.com/releases/2026/02/10/patch-release-gitlab-18-8-4-released/

All References (3)

→
https://about.gitlab.com/releases/2026/02/10/patch-release-gitlab-18-8-4-released/Release Notes · Vendor Advisory
→
https://gitlab.com/gitlab-org/gitlab/-/issues/587688Broken Link · Issue Tracking
→
https://hackerone.com/reports/3517928Permissions Required

Quick Facts

CVE IDCVE-2026-1456
CVSS Score6.5 / 10
SeverityMEDIUM
WeaknessCWE-770
CISA KEVNo
EPSS (30d)0.03%
Affected1 vendor
PublishedFeb 11, 2026

Related CVEs (CWE-770)

CVE-2026-12818
9.3
CVE-2026-48854
8.7
CVE-2026-35469
8.7
CVE-2026-42786
8.7
CVE-2026-43973
8.7
CVE-2026-32145
8.7

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2026-1456 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.
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