predictable WebSocket mask (curl curl)
At a glance
- Source
- NVD
- EPSS
- EPSS 0.52 % · percentile 44 ()
- State
- PUBLISHED
- Published
- Updated
- Assigner
- curl
- NVD status
- Modified
Description
curl's WebSocket code did not update the 32-bit mask pattern for each new outgoing frame as the specification says. Instead it used a fixed mask that persisted and was used throughout the entire connection. A predictable mask pattern allows for a malicious server to induce traffic between the two communicating parties that could be interpreted by an involved proxy (configured or transparent) as genuine, real, HTTP traffic with content and thereby poison its cache. That cached poisoned content could then be served to all users of that proxy.
Weaknesses (CWE)
- CWE-340 — Generation of Predictable Numbers or Identifiers
References
Scores
| Version | Score | Vector | Scored by |
|---|---|---|---|
| CVSS 3.1 | MEDIUM 5.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N | CISA-ADP |
| CVSS 3.1 | MEDIUM 5.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N | NVD · 134c704f-9b21-4f2e-91b3-4a467353bcc0 (Secondary) |
European references
- ENISA EUVD · EUVD-2025-29013
- GCVE · GCVE-0-2025-10148
CERT-FR advisories
- CERTFR-2026-AVI-1351 — Multiples vulnérabilités dans Oracle MySQL · cert.ssi.gouv.fr
- CERTFR-2026-AVI-0281 — Multiples vulnérabilités dans les produits Splunk · cert.ssi.gouv.fr
- CERTFR-2026-AVI-0218 — Multiples vulnérabilités dans les produits VMware · cert.ssi.gouv.fr
- CERTFR-2026-AVI-0199 — Multiples vulnérabilités dans les produits VMware · cert.ssi.gouv.fr
- CERTFR-2026-AVI-0112 — Multiples vulnérabilités dans les produits VMware · cert.ssi.gouv.fr
- CERTFR-2026-AVI-0101 — Multiples vulnérabilités dans les produits Siemens · cert.ssi.gouv.fr
- CERTFR-2026-AVI-0093 — Multiples vulnérabilités dans Tenable Network Monitor · cert.ssi.gouv.fr
- CERTFR-2026-AVI-0071 — Multiples vulnérabilités dans Oracle PeopleSoft · cert.ssi.gouv.fr
- CERTFR-2026-AVI-0070 — Multiples vulnérabilités dans Oracle MySQL · cert.ssi.gouv.fr
- CERTFR-2025-AVI-0969 — Multiples vulnérabilités dans les produits VMware · cert.ssi.gouv.fr
- CERTFR-2025-AVI-0958 — Multiples vulnérabilités dans Tenable Identity Exposure · cert.ssi.gouv.fr
- CERTFR-2025-AVI-0775 — Multiples vulnérabilités dans Curl · cert.ssi.gouv.fr
Affected configurations (NVD CPE)
cpe:2.3:a:haxx:curl:*:*:*:*:*:*:*:*≥ 8.11.0 < 8.16.0
Affected products
| Product | Versions |
|---|---|
| curl · curl | affected 8.11.0 < 8.14.2 ; affected 8.15.0 < 8.16.0 |
| curl · curl | affected d78e129d50b2d190f1c1bde2ad1f62f02f152db0 < 84db7a9eae8468c0445b15aa806fa7fa806fa0f2 |
| curl · curl | affected 8.15.0 ; affected 8.14.1 ; affected 8.14.0 ; affected 8.13.0 ; affected 8.12.1 ; affected 8.12.0 |
Sources
| Source | Licence |
|---|---|
| CVE List (CVEProject cvelistV5) | CVE Program Terms of Use |
| EPSS (FIRST.org) | FIRST — attribution requested |
| ENISA EUVD | ENISA — reproduction authorised, source acknowledged |
| CERT-FR (ANSSI) | Licence Ouverte / Etalab 2.0 |
| NVD (NIST) via fkie-cad/nvd-json-data-feeds | Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD |