Background exploitation KEV catalog No authentication

CVE-2021-39935

GitLab Community and Enterprise Editions Server-Side Request Forgery (SSRF) Vulnerability

An issue has been discovered in GitLab CE/EE affecting all versions starting from 10.5 before 14.3.6, all versions starting from 14.4 before 14.4.4, all versions starting from 14.5 before 14.5.2. Unauthorized external users could perform…

CheckOps priority index

6.2/10 Patch within 7 days

Severity6.8

Probability3.6

Exploitation4/5

Severity = CVSS. Probability = EPSS (FIRST). Exploitation = public signals: KEV, EUVD, ransomware, EPSS above 10 %, no account required.

EPSS · today 36.1% higher than 98.5% of CVEs

CVSS 3.1 6.8 AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:

Exploited for 273 days 03 Feb 2026

CISA due date 24 Feb 2026 for US federal agencies

Exploitation probability EPSS · FIRST

EPSS probability (%)Percentile among all CVEs

Exploitation signals 4 / 5

KEV catalog (CISA)03 Feb 2026
Exploited in EUVD (ENISA)03 Feb 2026
Used by ransomwareno
EPSS above 10 %36.1%
No account, over the networkyes

What to do

Fix

Apply the vendor’s fix as soon as it is available.

CISA guidance: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

Meanwhile

Take the service off the internet or restrict access to it, watch the logs and look for signs of compromise.

Manufacturers (CRA)

Exploited vulnerability in your product: early warning to ENISA within 24 h, then notification within 72 h (Article 14 of the Cyber Resilience Act). The CRA explained

Description ENISA EUVD

Affected products

GitLabCommunity and Enterprise Editions

Affected versions

10.5, <14.3.6
14.4, <14.4.4
14.5, <14.5.2

Weaknesses (CWE)

CWE-918

Open source packages OSV

Affected libraries according to OSV, with fixed versions.

Timeline

13 Dec 2021
Published
03 Feb 2026
Exploitation reported (ENISA)
03 Feb 2026
Added to the KEV catalog
24 Feb 2026
CISA remediation due date
06 Oct 2026
EPSS peak: 36.1%

References

Other exploited vulnerabilities from the same vendor

CVE-2026-97229GitLab Community Edition and Enterprise Edition Integer Overflow or Wraparound Vulnerability
7.2 · Rising fast
CVE-2026-85706GitLab Community Edition and Enterprise Edition Path Traversal Vulnerability
9.3 · Actively exploited
CVE-2021-22175GitLab Server-Side Request Forgery (SSRF) Vulnerability
6.7 · Background exploitation
CVE-2023-7028GitLab Community and Enterprise Editions Improper Access Control Vulnerability
9.2 · Background exploitation
CVE-2021-22205GitLab Community and Enterprise Editions Remote Code Execution Vulnerability
10.0 · Background exploitation