CVE-2026-111663
CRITICAL 9.2Chaskiq through 2.0.3 contains a server-side request forgery vulnerability that allows unauthenticated attackers to fetch arbitrary URLs via the createUrlUpload GraphQL mutation. Attackers can submit internal URLs, including cloud instance metadata endpoints, through POST /graphql and retrieve the full response via the returned ActiveStorage blob URL.
Severe if exploited (CVSS 9.2), but no known exploitation and low modeled probability. Patch on a normal cadence.
Exploitation likelihood
0.4%chance of exploitation in 30 days · 31st percentile
Impact if exploited
9.2CVSS 4.0 · CRITICAL
- ConfidentialityHigh
- IntegrityNone
- AvailabilityNone
What an attacker needs
- ✓Access: Reachable over the network — no local access needed
- ✓Privileges: No account or privileges required
- ✓User interaction: No user interaction needed
- ✓Complexity: No special conditions — reliably repeatable
- ✓Requirements: No special attack requirements
✓ lowers the bar for an attacker · ⚠ raises it
Proof of concept
No public PoC is currently catalogued.
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Data snapshot:
Weakness (CWE)
- CWE-918: Server-Side Request Forgery (SSRF)
CVSS vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:H/SI:N/SA:N
References and research data (JSON)
All CVSS metrics
- CRITICAL 9.2 v4.0 · CNA Primary
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:H/SI:N/SA:N - HIGH 8.6 v3.1 · CNA Primary
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N - CRITICAL 9.2 v4.0 · NVD Secondary
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:H/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X - HIGH 8.6 v3.1 · NVD Secondary
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N
References
Exploit-tagged references (not proof of a PoC)
- https://hackmd.io/@hieuPenguinnn/chaskiq-unauthenticated-ssrf-oembed-url-upload CVE record · VulnCheck · Updated 2026-10-16T17:39:26.910Z
CVE record · CISA-ADP · Updated 2026-10-23T15:56:17.575Z
NVD · CVE-2026-111663 · Updated 2026-10-23T16:16:51.090
Advisories
- https://www.vulncheck.com/advisories/chaskiq-through-2.0.3-ssrf-via-createurlupload-graphql-mutation CVE record · VulnCheck · Updated 2026-10-16T17:39:26.910Z
NVD · CVE-2026-111663 · Updated 2026-10-23T16:16:51.090 - https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-102954 EUVD · EUVD-2026-102954
Technical & other
- https://github.com/chaskiq/chaskiq/blob/2.0.3/app/graphql/mutations/create_url_upload.rb#L29-L66 CVE record · VulnCheck · Updated 2026-10-16T17:39:26.910Z
NVD · CVE-2026-111663 · Updated 2026-10-23T16:16:51.090 - https://github.com/chaskiq/chaskiq/blob/2.0.3/app/controllers/graphql_controller.rb#L3-L33 CVE record · VulnCheck · Updated 2026-10-16T17:39:26.910Z
NVD · CVE-2026-111663 · Updated 2026-10-23T16:16:51.090