TI-2026-71262 Aliases CVE-2026-108924 GHSA-crvc-58c5-p9vq

Authorization bypass in Kirby dynamic option generation

LOW 24CWE-285Published 2026-10-12 · Updated 2026-10-16

Key facts

Attack vector: Network
Privileges required: Low
User interaction: None
Attack complexity: Low
Attack requirements: None
Impact type: Security bypass
Confidentiality · integrity · availability: Low · None · None
Fix status: Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-285.

Summary

getkirby Kirby from 4.9.0 before 4.9.6 and from 5.5.0 before 5.6.0 is affected. Improper authorization in OptionsQuery::resolve in the Dynamic Option Generation component lets a key controlled by the user bypass authorization checks (CWE-639). A remote attacker with low privileges can bypass authorization without user interaction, with limited confidentiality impact.

Written with Claude Haiku 5.5 from the sources below · 2026-10-29

Description from the CNA

A vulnerability was identified in getkirby Kirby up to 4.9.5/5.5.3. Affected by this issue is the function OptionsQuery::resolve of the file src/Option/OptionsQuery.php of the component Dynamic Option Generation. The manipulation leads to authorization bypass. The attack is possible to be carried out remotely. Upgrading to version 4.9.6 and 5.6.0 can resolve this issue. You should upgrade the affected component.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00307 23rd percentileScored 2026-11-07

Fix Fixed Kirby (getkirby): 4.9.6, 5.6.0

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: No
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
getkirby	Kirby	4.9.0; 4.9.1; 4.9.2; 4.9.3; 4.9.4; 4.9.5; 5.5.0; 5.5.1; 5.5.2; 5.5.3	4.9.6, 5.6.0	Patch available	CNA

Kirby Vendorgetkirby Affected 4.9.0; 4.9.1; 4.9.2; 4.9.3; 4.9.4; 4.9.5; 5.5.0; 5.5.1; 5.5.2; 5.5.3 Fixed in 4.9.6, 5.6.0 Patch available CNA

CPE names CNA · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:getkirby:kirby::::::::	—	—	getkirby

cpe:2.3:a:getkirby:kirby:*:*:*:*:*:*:*:* Versions — — ·getkirby

Remediation

Upgrade Kirby to version 4.9.6 or 5.6.0, depending on the release line in use.

Written with Claude Haiku 5.5 from the sources below · 2026-10-29

Fix · CNA Kirby (getkirby) Fixed in 4.9.6, 5.6.0

Timeline

2026-10-12 Threatist record created from CVE-2026-108924
2026-10-13 Alias added: GHSA-crvc-58c5-p9vq
2026-10-16 CISA SSVC decision points changed

References

Patch 1

https://github.com/getkirby/kirby/releases/tag/4.9.6

Other 3

TI-2024-17440 An arbitrary file upload vulnerability in the Profile Image module of Kirby CMS v4.1.0… CVSS 3.1HIGH 8.8
TI-2024-17439 An HTML injection vulnerability exists in the Edit Content Layout module of Kirby CMS… CVSS 3.1HIGH 7.1
TI-2026-23396 Kirby CMS through 5.1.4 allows an authenticated user with 'Editor' permissions to cause a… CVSS 3.1MEDIUM 6.5
TI-2024-17441 A stored cross-site scripting (XSS) vulnerability in the Edit Content Layout module of… CVSS 3.1MEDIUM 6.1
TI-2018-10413 An issue was discovered in Kirby 2.5.12. CVSS 3.1MEDIUM 5.4
TI-2024-17438 Kirby CMS v4.1.0 was discovered to contain a reflected self-XSS vulnerability via the URL parameter. CVSS 3.1MEDIUM 4.7

See all 61 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences