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  4. CVE 2026 121620 coopcycle coopcycle web 560 before 6200 missing
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Back to active CVEs
High · CVSS 8.3CVE-2026-121620

CoopCycle coopcycle-web 5.6.0 before 6.20.0 Missing Zelty Webhook Signature VerificationCVE-2026-121620

Answer in brief

CVE-2026-121620 records a High severity (CVSS 8.3) vulnerability in CoopCycle coopcycle-web 5.6.0 before 6.20.0 Missing Zelty Webhook Signature Verification. The current sources do not mark it as known exploited. The current feed maps CoopCycle/coopcycle-web (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Nov 4, 2026Updated Nov 4, 2026Source checked Nov 4, 2026First seen by HOL Nov 4, 2026Material review Nov 4, 2026
Upstream Advisory

Record context

Vulnerability class
Missing Auth
EPSS
Not reported
CWE IDs
CWE-345
Source
CVE List V5
Source checked
Nov 4, 2026
References
5 linked sources
Open source record

Key facts

Risk
High · CVSS 8.3
Exploitation
Not marked as known exploited
Affected software
1 mapped package or product
Fix availability
Available

Why this deserves its current priority

CVSS is 8.3. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps CoopCycle/coopcycle-web (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
CoopCycle/coopcycle-webgeneric>=5.6.0 <6.20.06.20.0

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for CoopCycle/coopcycle-web.
  2. 2Review the reported fix. Update CoopCycle/coopcycle-web to 6.20.0 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

  1. Published upstream

    Nov 4, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Nov 4, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Nov 4, 2026

Sources and claim methodology

  • GitHub security advisorygithub.com
  • GitHub security advisorygithub.com
  • GitHub security advisorygithub.com
  • GitHub security advisorygithub.com
  • Source referencevulncheck.com
Upstream source description

CoopCycle coopcycle-web 5.6.0 before 6.20.0 contains a missing authentication vulnerability that allows unauthenticated attackers to forge Zelty webhook events because the x-zelty-hmac-sha256 HMAC signature is never verified. Attackers can POST forged dish, menu, option and order-status events to /api/zelty/webhook/* endpoints to toggle restaurant products and alter order preparation states.

Quoted source text, attributed separately from HOL analysis.

Related CVEs

  • CoopCycle coopcycle-web before 6.20.1 IDOR via Incident Resource and Action EndpointSame coopcycle/coopcycle-web package