# CVE-2026-126938: Zipline before 4.6.4 Upload Quota Bypass via Forged Content-Range Headers

Status: published. Published: 2026-11-13. Updated: 2026-11-13.

Zipline before 4.6.4 contains a resource allocation vulnerability that allows authenticated users to bypass chunked-upload size and quota checks by forging Content-Range offsets and totals. Attackers can send tiny chunks to the partial upload endpoint with large declared offsets, causing the server to create oversized files and exhaust disk space.

## Remediation

No remediation reported in collected sources

## Affected products and versions

- diced / zipline: ≥ 0; < 4.6.4 (affected, semver); 4.6.4 (unaffected, semver). Source: CNA: VulnCheck

## Severity and prioritization

- CVSS 4.0: 7.1 (high); CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N; source: CNA: VulnCheck

- CVSS 3.1: 7.1 (high); CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:H; source: CNA: VulnCheck

- CVSS 4.0: 7.1 (high); CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:H/SC:N/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; source: NVD: disclosure@vulncheck.com

- CVSS 3.1: 7.1 (high); CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:H; source: NVD: disclosure@vulncheck.com

- CISA KEV: No listing in collected sources

- EPSS: 0.41% as of 2026-11-13; percentile 36.34%

- SSVC: exploitation poc; automatable no; technical impact partial; source ADP: CISA-ADP

- Weaknesses: CWE-770

## Exploit evidence

- exploit: https://github.com/diced/zipline/security/advisories/GHSA-fp8p-hf8g-fw65 (ADP: CISA-ADP)

## References

- https://github.com/diced/zipline/security/advisories/GHSA-fp8p-hf8g-fw65 (CNA: VulnCheck; vendor-advisory)

- https://www.vulncheck.com/advisories/zipline-before-4.6.4-upload-quota-bypass-via-forged-content-range-headers (CNA: VulnCheck; third-party-advisory)

- https://github.com/diced/zipline/security/advisories/GHSA-fp8p-hf8g-fw65 (ADP: CISA-ADP; exploit)

- https://github.com/diced/zipline/security/advisories/GHSA-fp8p-hf8g-fw65 (disclosure@vulncheck.com)

- https://www.vulncheck.com/advisories/zipline-before-4.6.4-upload-quota-bypass-via-forged-content-range-headers (disclosure@vulncheck.com)

## Provenance

- CNA: VulnCheck: https://www.cve.org/CVERecord?id=CVE-2026-126938; retrieved 2026-11-13; source updated 2026-11-13

- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-126938; retrieved 2026-11-13; source updated 2026-11-13

- FIRST EPSS: https://api.first.org/data/v1/epss?cve=CVE-2026-126938; retrieved 2026-11-13; source updated Not reported

Revision: 820126225dbec54bc457d6ff4ccdfdbad358587739fd01fda0f16d6809419333

Canonical: https://y2.dev/cve/CVE-2026-126938

## Agent and API access

Public CVE pages, Markdown, and JSON are free to read without an account or API key.

- Public catalog: https://y2.dev/cve/index.json. Follow nextCursor with the same search, filters, sort, and limit (1–100). A null cursor marks the end.

- WebMCP: search_cve_disclosures, get_cve_disclosure, get_cve_page_markdown, get_y2_cve_access. Available in compatible browsers.

- Cyber API: https://api.y2.dev/api/v2/cyber/cves and https://api.y2.dev/api/v2/cyber/cves/{cveId}.

- Y2 Pro or Elite: create a workspace API key with the intel:cyber scope and send Authorization: Bearer <Y2_API_KEY>. Setup: https://y2.dev/docs/api/create-key.

- x402: Pay per request without an account or API key. Omit Authorization, read the HTTP 402 PAYMENT-REQUIRED challenge, validate its current requirements, and retry with PAYMENT-SIGNATURE through an authorized payment client. These browser tools never make payments. Guide: https://y2.dev/docs/api/x402.

- OpenAPI: https://y2.dev/api/openapi.yaml. Agent access metadata: https://y2.dev/cve/agent.json.

Collected public records only. Check source status for coverage and freshness.