TI-2025-09319 Aliases CVE-2025-10148 GHSA-cxvq-c3r3-8gwq

predictable WebSocket mask

LOW 25CWE-340Published 2025-09-12 · Updated 2026-09-15

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: Low
Impact type: —
Confidentiality · integrity · availability: Low · None · None
Fix status: Partial Red Hat: 1 fixed, 2 without a fix

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA and Red Hat.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00524 44th percentileScored 2026-11-07

Fix Partial curl (curl): 8.14.2, 8.16.0Red Hat: 1 advisoryRed Hat: 1 fixed, 2 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: No
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
curl	curl	8.11.0 to before 8.14.2; 8.15.0 to before 8.16.0	8.14.2, 8.16.0	Patch available	CNA
curl	curl	8.15.0; 8.14.1; 8.14.0; 8.13.0; 8.12.1; 8.12.0; 8.11.1; 8.11.0	—	No fix listed	CNA

curl Vendorcurl Affected 8.11.0 to before 8.14.2; 8.15.0 to before 8.16.0 Fixed in 8.14.2, 8.16.0 Patch available CNA
curl Vendorcurl Affected 8.15.0; 8.14.1; 8.14.0; 8.13.0; 8.12.1; 8.12.0; 8.11.1; 8.11.0 Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:haxx:curl::::::::	8.11.0 to before 8.16.0	Vulnerable	Haxx

cpe:2.3:a:haxx:curl:*:*:*:*:*:*:*:* Versions 8.11.0 to before 8.16.0 Vulnerable ·Haxx

Remediation

Fix · CNA curl (curl) Fixed in 8.14.2, 8.16.0

Red Hat 1 advisory

RHSA-2026:6893 Released 2026-04-07 · Red Hat rating Moderate
Red Hat Hardened Images RPMs bug fix and enhancement update
- Red Hat Hardened Images curl-8.19.0-3.hum1@aarch64, curl-8.19.0-3.hum1@src, curl-8.19.0-3.hum1@x86_64 +6

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

Release · 2025-09-12
curl 8.14.2, 8.16.0
2 records Highest priority Priority LOW 2 LOW
Other records, highest priority first
- TI-2025-08328 Out of bounds read for cookie pathPriority LOW 36
Show all 2 records →

Vendor assessments

Red Hat

Red Hat rating: Low. Red Hat's page for this CVE →

Product	Status	Plan or fix
Red Hat Enterprise Linux 10	Affected	No fix yet: Fix deferred
Red Hat JBoss Core Services	Affected	No fix yet: Fix deferred
Red Hat Hardened Images	Fixed	RHSA-2026:6893

Not affected: 7 products

Red Hat Enterprise Linux 6
Red Hat Enterprise Linux 7
Red Hat Enterprise Linux 8
Red Hat Enterprise Linux 9
Red Hat OpenShift Container Platform 4
Red Hat OpenShift Dev Spaces
Red Hat Trusted Profile Analyzer

Timeline

2026-10-02 Threatist record created from CVE-2025-10148
2026-10-03 Alias added: GHSA-cxvq-c3r3-8gwq

References

Patch 2

Advisory 4

TI-2023-19922 Out-of-bounds write in curl CVSS 3.1CRITICAL 9.8
TI-2026-16162 Negotiate ambient user conn reuse CVSS 3.1CRITICAL 9.8
TI-2026-10231 cross-origin Digest auth state leak CVSS 3.1CRITICAL 9.8
TI-2026-09063 HTTP/2 stream-dependency tree UAF CVSS 3.1CRITICAL 9.8
TI-2026-07976 stale proxy password leak CVSS 3.1CRITICAL 9.8
TI-2026-07845 SASL double-free CVSS 3.1CRITICAL 9.8

See all 103 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences