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🛡️ CVE-2026-12436 — gitlab

🟠 CVSS 8.0 — High ✅ No Known Exploit CWE-915 OSV
8.0
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

Improperly Controlled Modification of Dynamically-Determined Object Attributes in GitLab

GitLab has remediated an issue in GitLab CE/EE affecting all versions from 18.0 before 19.0.5, 19.1 before 19.1.3, and 19.2 before 19.2.1 that under certain conditions could have allowed an authenticated user to modify CI/CD configuration belonging to another user due to improper validation of user-supplied attributes when processing pipeline schedule inputs.

How this vulnerability can be exploited

This issue can be reached over the network, attack complexity is high, an attacker needs low-level privileges on the target. No user interaction is required. The scope is changed, meaning a successful attack can affect components beyond the vulnerable one. Rated impact: confidentiality high, integrity high, availability low.

CVSS metrics in full

The score comes from this vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:L

  • Attack vector: Network — reachable from anywhere that can route to the service.
  • Attack complexity: High — the attacker first has to win a race, learn a secret or otherwise prepare the target.
  • Privileges required: Low — an ordinary user account is enough.
  • User interaction: None — nobody has to be tricked into anything.
  • Scope: Changed — a successful attack reaches components beyond the vulnerable one.
  • Confidentiality impact: High — total loss, or loss the attacker controls.
  • Integrity impact: High — total loss, or loss the attacker controls.
  • Availability impact: Low — limited, and the attacker does not choose what is affected.

Weakness class

CVE-2026-12436 is classified as CWE-915: Improperly Controlled Modification of Object Attributes. A request can set object fields that were never meant to be writable from outside.

Affected software

CVE-2026-12436 is recorded against 1 package.

  • gitlab

Timeline and source

Published on 17 August 2026. No public exploit is currently recorded for this entry. Record sourced from OSV.

References

docs.gitlab.com (Web)
gitlab.com (Web)
hackerone.com (Web)
nvd.nist.gov (Web)

Other advisories for this package

gitlab has other advisories on record. If you are patching this one, these are worth checking on the same host:

Same weakness in other software

These advisories are the same class of weakness (CWE-915: Improperly Controlled Modification of Object Attributes) in other software:

Details

Severity HIGH
CVSS Score 8.0
CVSS Vector CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:L
CWE CWE-915
Public Exploit ✅ No
Source OSV
Published 2026-08-17
Updated 2026-08-20
Modified 2026-08-17
Fix URL N/A

Affected Packages

Software From version Fixed in
gitlab — —

Similar Threats

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ⓘ Data Notice: The information presented above has been compiled from publicly available internet sources. Boteraser aggregates this data solely for informational purposes and does not independently classify, evaluate, or endorse any findings about the vulnerabilities listed. The accuracy and completeness of this information is the sole responsibility of the original publishers. Boteraser and its operators accept no liability for any decisions made based on this data.

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