TI-2026-55255 Aliases CVE-2026-79778 GHSA-hqc5-cqqv-7gwf

rclone before v1.75.0 Denial of Service via TUS nil-response panic

MEDIUM 60CWE-248Published 2026-08-25 · Updated 2026-08-25

Key facts

Attack vector: Network
Privileges required: None
User interaction: Passive
Attack complexity: High
Attack requirements: Present
Impact type: Denial of service
Confidentiality · integrity · availability: None · None · High
Fix status: Partial Red Hat: 2 without a fix

Attack profile from CVSS 4.0 · CNA. Fix status from CNA and Red Hat. Impact type from CWE-248.

Summary

rclone before v1.75.0 contains a denial of service vulnerability in the WebDAV TUS creation handler that dereferences a nil response before checking for transport errors. A malicious or compromised configured endpoint can reset connections during TUS uploads to trigger a panic that terminates unrecovered goroutines and halts unrelated work in long-lived processes.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV

EPSS 0.00285 21st percentileScored 2026-11-07

Fix Partial rclone (rclone): 1.75.0Red Hat: 2 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: Poc
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
rclone	rclone	before 1.75.0	1.75.0	Patch available	CNA

rclone Vendorrclone Affected before 1.75.0 Fixed in 1.75.0 Patch available CNA

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPE	Versions	Role	Vendor
cpe:2.3:a:rclone:rclone::::::::	—	—	rclone

cpe:2.3:a:rclone:rclone:*:*:*:*:*:*:*:* Versions — — ·rclone

Remediation

Fix · CNA rclone (rclone) Fixed in 1.75.0

Fixed in the same release

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

Release · 2026-08-25
rclone 1.75.0
5 records Highest priority Priority HIGH 1 HIGH, 3 MEDIUM, 1 LOW
Other records, highest priority first
- TI-2026-55253 rclone before 1.75.0 Authentication Bypass via pprofPriority HIGH 70
- TI-2026-55257 rclone before v1.75.0 Credential Exposure via S3 RedirectPriority MEDIUM 60
- TI-2026-55254 rclone before v1.75.0 Information Disclosure via RC APIPriority MEDIUM 56
Show all 5 records →

Vendor assessments

Red Hat

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

Product	Status	Plan or fix
Cryostat 4	Affected	No fix yet: Fix deferred
Red Hat Advanced Cluster Management for Kubernetes 2	Affected	No fix yet: Fix deferred

Timeline

2026-10-02 Threatist record created from CVE-2026-79778
2026-10-03 Alias added: GHSA-hqc5-cqqv-7gwf

References

Advisory 1

GitHub Security Advisory (GHSA-3x6r-wxxg-53vv)

TI-2026-60044 rclone serve s3: --auth-proxy without --auth-key authenticates nobody - full SigV4 signature bypass CVSS 3.1CRITICAL 9.8
TI-2026-29802 RClone: Unauthenticated operations/fsinfo allows attacker-controlled backend instantiation and local command execution CVSS 4.0CRITICAL 9.2
TI-2026-29799 Rclone: Unauthenticated options/set allows runtime auth bypass, leading to sensitive operations and command execution CVSS 4.0CRITICAL 9.2
TI-2026-60064 rclone: RC per-server auth-proxy bypass CVSS 3.1CRITICAL 9.1
TI-2026-42602 Path traversal in rclone CVSS 3.1HIGH 8.8
TI-2026-60065 rclone: S3 multipart declared-length memory exhaustion CVSS 3.1HIGH 7.5

See all 43 →

Sources

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