CVE-2026-15216
CVE-2026-15216 — Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in GitLab
GitLab has remediated an issue in GitLab CE/EE affecting all versions from 18.2 before 19.0.6, 19.1 before 19.1.4, and 19.2 before 19.2.2 that under certain conditions could have allowed cross-site scripting due to improper neutralization of user-controlled data rendered in pagination controls by an analytics dashboard component.
Published Updated Sources: NVD, GitLab (CNA), GitHub, SOCRadar CTI
Triage
Is it exploited, how likely is exploitation, what does it touch, and how severe do the scoring sources call it.
Exploitation
Reported
not confirmed by CISA
EPSS
0%
ahead of 0% of scored CVEs
CVSS base
8.7
high
CISA SSVC assessment
Three decision points CISA publishes for the CVEs it assesses · SSVC 2.0.3. A stakeholder decision, not a severity score.
Exploitation
None
none · proof-of-concept · active
Automatable
No
can an attacker script all four kill-chain steps
Technical impact
Total
partial · total control of the vulnerable component
Remediation
The vendor's own words where we have them.
Upgrade to versions 19.0.6, 19.1.4, 19.2.2 or above.
First 24 hours
Ordered from the record's own fields — exposure first, because you cannot patch what you have not found.
- Identify exposed assets running affected vendor/product/version combinations.
- Prioritize based on EPSS, PoC availability, and external exposure.
- Search available logs for exploit probes, errors, authentication anomalies, or suspicious child processes matching the vulnerability class.
Affected scope
Vendor, product and version as the advisories word them.
| Vendor | Product | Versions | Status |
|---|---|---|---|
| GitLab | GitLab | 18.2 to < 19.0.6 | Vulnerable |
| GitLab | GitLab | 19.1 to < 19.1.4 | Vulnerable |
| GitLab | GitLab | 19.2 to < 19.2.2 | Vulnerable |
Attack characteristics
The CVSS vector, decoded. It describes the attack, not your exposure to it.
Availability
None
Confidentiality
High
Integrity
High
Scope
Changed
Attack Complexity
Low
Attack Vector
Network
Privileges Req
Low
User Interaction
Required
Every base score collected
Sources score independently and disagree; each row says who scored it and under which version.
| Score | Version | Severity | Expl. | Impact | Source |
|---|---|---|---|---|---|
| 8.7 | CVSS 3.1 | high | 2.3 | 5.8 | gitlab.com (CNA), GitLab (CNA) |
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N
What this weakness leads to
MITRE's own consequences and mitigations for the weakness class — the authority's wording, not guidance derived from the CVSS vector.
CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
- Bypass Protection Mechanism
- Read Application Data
- Execute Unauthorized Code or Commands
Mitigation: Use a vetted library or framework that does not allow this weakness to occur or provides constructs that make this weakness easier to avoid. Examples of libraries and frameworks that make it easier to generate properly encoded output include Microsoft's Anti-XSS library, the OWASP ESAPI Encoding module, and Apache Wicket.
Weakness & attack patterns
- CWE-79Cross-site Scripting
Attack patterns reported against this CVE. The ATT&CK techniques below are inferred from its weakness class.
Public exploit
Capability, not use: code existing is a different claim from anyone running it.
Repositories
2
1 of the 2 sampled are weaponized
Detection
Read off the CVSS vector and the weakness class. Starting points, not rules we have tested.
- Search application, proxy, and WAF logs for requests touching /EE.
- Prioritize edge telemetry for network-reachable GitLab.
- Monitor for scanner or exploit-pattern traffic after 2 public PoC repositories were reported.
Timeline
What happened to this CVE, newest first — with the readings a source repeats on a schedule counted underneath rather than listed.
- 2026
Added · CVSS 3.1 8.7 (AV:N)
Aug 19, 2026 · NVD
Initial · CVE published
Aug 12, 2026 · NVD
References
3 on the record
- docs.gitlab.com/releases/patches/patch-release-gitlab-19-2-2-released/
Release Notes
- gitlab.com/gitlab-org/gitlab/-/work_items/605448
Broken Link
- hackerone.com/reports/3830061
Permissions Required
Elsewhere on this site
- GitLabevery CVE for this vendor
- Cross-site Scriptingsame class
- CWE-79other pages naming this weakness
Not in any source we poll
Listed rather than left blank: an empty field and an unmeasured one look identical on screen, and only one is a reason to look elsewhere.
- No confirmed IOCs, IP addresses, domains, file hashes, or malware artifacts supplied.
- No organization-specific asset inventory, compensating-control status, or patch deployment evidence supplied.
- No exploit packet captures, log samples, or incident case IDs supplied.
Answered from this record1
What should defenders know first?
CVE-2026-15216 is Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in GitLab, a high vulnerability affecting GitLab from GitLab. The current evidence does not list it in CISA KEV, and the exploit status is: Exploitation is reported, but no independent confirmation is available in the sources we have. Public exploit evidence is: 2 public PoC repositories reported; 1 marked weaponized in current dataset. The affected-version evidence is listed in the key facts and affected products tables. Defenders should first verify whether exposed or business-critical assets run those versions, then apply vendor patches or mitigations, restrict reachable attack surface, and preserve logs for detection review. CVSS 8.7 describes technical severity, while EPSS 0% helps estimate near-term exploit likelihood; neither replaces asset context. Unknown fields should remain explicit in tickets, and threat actor, IOC, victimology, or payload claims should not be added unless a cited source supports them. Monitor CISA KEV, vendor advisories, NVD changes, public PoC repositories, and internal telemetry for update triggers.