cve.bz

CVE-2026-126936 Zipline before 4.7.0 Race Condition in Invite and Quota Limits

6.0 mediumEPSS 0.3%

Medium (6.0) in diced zipline. EPSS 0.3% estimated probability of exploitation activity in the next 30 days.

On this page
Zipline before 4.7.0 contains a race condition vulnerability that allows users to bypass invitation usage limits, upload storage quotas, and shortened-URL quotas through concurrent requests. Attackers can send overlapping registration, upload, or URL creation requests that pass checks against stale state, creating extra accounts and exceeding administrator-configured resource quotas.

Severity

CVSS 4.0

6.0 medium
CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N

CVSS 3.1

5.9 medium
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:H
EPSS
0.3% estimated probability of exploitation activity in the next 30 days; 20th percentile. Scored 2026-11-13. A forecast for this CVE across the internet, not for your own systems.
CWE
CWE-367 Time-of-check Time-of-use (TOCTOU) Race Condition
Published
Assigned by
VulnCheck (CNA)
NVD analysis
Awaiting analysis
Record from
the NVD, synced

Ask an AI about this CVE

ChatGPTClaudeGoogle AI Mode

Show the promptExplain CVE-2026-126936 for an engineer deciding whether to act. Use https://cve.bz/api/public/cves/CVE-2026-126936?via=ask-ai-copy and https://cve.bz/cve/CVE-2026-126936?via=ask-ai-copy as the source of truth: what is affected and which versions fix it, whether it is in CISA KEV, public exploits, and its EPSS (an internet-wide 30-day estimate of exploitation activity, not a forecast for my systems). If they give no fixed versions, use the CVE record https://cveawg.mitre.org/api/cve/CVE-2026-126936 or the vendor advisory, not third-party mirrors. Tell me how to check whether I am affected and how to verify a fix. Cite the sources and say where they are uncertain.

Opens a third-party assistant; its answer is its own, not cve.bz's. The prompt holds only this CVE's id and public links.

Badge for a README or a site

CVE-2026-126936

An image that stays current: it is drawn from the data each time it is fetched (a host that proxies images, as GitHub does, may show its copy for a while). Markdown:

[![CVE-2026-126936](https://cve.bz/cve/badge/CVE-2026-126936.svg)](https://cve.bz/cve/CVE-2026-126936)

HTML:

<a href="https://cve.bz/cve/CVE-2026-126936"><img src="https://cve.bz/cve/badge/CVE-2026-126936.svg" alt="CVE-2026-126936"></a>

Affected

Versions

From the CNA's record in the CVE List.

ProductAffected
diced ziplinebefore 4.7.0

Attack patterns (CAPEC)

  • CAPEC-27 Leveraging Race Conditions via Symbolic Links Likelihood: Medium · Severity: High
  • CAPEC-29 Leveraging Time-of-Check and Time-of-Use (TOCTOU) Race Conditions Likelihood: High · Severity: High

The attack patterns MITRE's CAPEC relates to this record's weaknesses, as MITRE names them. Credits.

References

Check your stackJSON