CVE-2026-79775

MEDIUMPre-NVD 6.56.5—
EchelonGraph scoreHIGH confidence

Score 6.5 from GitHub Security Advisory (severity: HIGH) published 2026-08-25. a secondary CVSS source baseline 6.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this weekElevated
6.5EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 6.5Exploit: Elevated riskExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

rclone versions >= v1.72.0 and <= v1.74.4 (fixed in v1.75.0) contain multiple denial-of-service vulnerabilities in the archive backend's SquashFS parser, which relies on the github.com/diskfs/go-diskfs dependency. The parser fails to validate attacker-controlled superblock and metadata values before use. An attacker who can place or modify a SquashFS image in storage exposed through an rclone :archive: remote can craft a malicious image that triggers an integer division-by-zero panic (zero block size), an out-of-bounds slice panic (out-of-range inode metadata offset), or a non-progress CPU loop (truncated metadata stream). Variants 1 and 2 terminate the rclone process and, via 'rclone serve sftp', can crash the entire SFTP server; variant 3 causes sustained CPU consumption. Parsing is lazy, so a victim or remote client must address or descend into the malicious archive object to trigger it.

CVSS v3
6.5
EG Score
6.5(high)
EG Risk
45(Track)
EG Risk 45/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity65% × 45%
Exploitation40% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
24%
KEV
Not listed

Published

August 25, 2026

Last Modified

September 10, 2026

Advisory Details (2)

Auto-updated Aug 25, 2026
🔬 Proof of concept available. Patch available. Sources: github.
generic

rclone Archive Backend SquashFS Parser Denial of Service | Advisories | VulnCheck

https://www.vulncheck.com/advisories/rclone-archive-backend-squashfs-parser-denial-of-service
github Patch Available🟡 PoC Available

Malformed SquashFS Images Cause Process Crashes and Persistent CPU Loops in rclone's Archive Backend · Advisory · rclone/rclone · GitHub

https://github.com/rclone/rclone/security/advisories/GHSA-6jcg-q3wp-x2f4

Vendor Advisories for CVE-2026-79775(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Affected Packages

(2 across 2 ecosystems)
Debian:12(1)
PackageVulnerable rangeFixed inDependents
rclone1.60.1+dfsg-2 ... 1.69.3+dfsg-3 (8 versions)——
Debian:13(1)
PackageVulnerable rangeFixed inDependents
rclone1.60.1+dfsg-4 ... 1.69.3+dfsg-3 (6 versions)——

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 18× in last 7d / 74× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-09-19 20:47 UTCEG score recompute
  2. 2026-09-19 20:47 UTCGHSA enrichment
  3. 2026-09-18 21:34 UTCEG score recompute
  4. 2026-09-18 21:34 UTCGHSA enrichment
  5. 2026-09-18 19:28 UTCEPSS rescore
  6. 2026-09-17 21:09 UTCEG score recompute
  7. 2026-09-17 21:09 UTCGHSA enrichment
  8. 2026-09-16 19:23 UTCEG score recompute
  9. 2026-09-16 19:23 UTCGHSA enrichment
  10. 2026-09-16 14:08 UTCEPSS rescore
  11. 2026-09-16 05:15 UTCEPSS rescore
  12. 2026-09-15 18:43 UTCEG score recompute
  13. 2026-09-15 18:43 UTCGHSA enrichment
  14. 2026-09-15 03:12 UTCEPSS rescore
  15. 2026-09-15 03:12 UTCEPSS rescore
  16. 2026-09-14 18:58 UTCGHSA enrichment
  17. 2026-09-13 18:39 UTCEG score recompute
  18. 2026-09-13 18:39 UTCGHSA enrichment
  19. 2026-09-12 19:26 UTCEG score recompute
  20. 2026-09-12 19:26 UTCGHSA enrichment
  21. 2026-09-11 20:12 UTCEG score recompute
  22. 2026-09-11 20:12 UTCGHSA enrichment
  23. 2026-09-11 14:53 UTCEPSS rescore
  24. 2026-09-11 14:53 UTCEPSS rescore
  25. 2026-09-10 20:59 UTCEG score recompute
Show 49 more
  1. 2026-09-10 20:59 UTCGHSA enrichment
  2. 2026-09-10 03:11 UTCGHSA enrichment
  3. 2026-09-09 03:57 UTCEG score recompute
  4. 2026-09-09 03:57 UTCGHSA enrichment
  5. 2026-09-08 22:01 UTCEPSS rescore
  6. 2026-09-08 04:44 UTCEG score recompute
  7. 2026-09-08 04:44 UTCGHSA enrichment
  8. 2026-09-07 05:31 UTCEG score recompute
  9. 2026-09-07 05:31 UTCGHSA enrichment
  10. 2026-09-06 13:48 UTCEPSS rescore
  11. 2026-09-06 06:18 UTCEG score recompute
  12. 2026-09-06 06:17 UTCGHSA enrichment
  13. 2026-09-05 07:02 UTCEG score recompute
  14. 2026-09-05 07:02 UTCGHSA enrichment
  15. 2026-09-04 07:49 UTCEG score recompute
  16. 2026-09-04 07:49 UTCGHSA enrichment
  17. 2026-09-04 05:07 UTCEPSS rescore
  18. 2026-09-03 08:36 UTCEG score recompute
  19. 2026-09-03 08:36 UTCGHSA enrichment
  20. 2026-09-02 14:12 UTCEPSS rescore
  21. 2026-09-02 09:18 UTCEG score recompute
  22. 2026-09-02 09:17 UTCGHSA enrichment
  23. 2026-09-01 13:54 UTCEPSS rescore
  24. 2026-09-01 10:03 UTCEG score recompute
  25. 2026-09-01 10:03 UTCGHSA enrichment
  26. 2026-09-01 04:40 UTCEPSS rescore
  27. 2026-09-01 04:40 UTCEPSS rescore
  28. 2026-08-31 10:50 UTCEG score recompute
  29. 2026-08-31 10:49 UTCGHSA enrichment
  30. 2026-08-30 19:18 UTCEPSS rescore
  31. 2026-08-30 19:17 UTCEPSS rescore
  32. 2026-08-30 11:33 UTCEG score recompute
  33. 2026-08-30 11:33 UTCGHSA enrichment
  34. 2026-08-30 01:22 UTCEPSS rescore
  35. 2026-08-29 12:20 UTCEG score recompute
  36. 2026-08-29 12:20 UTCGHSA enrichment
  37. 2026-08-29 11:59 UTCEG score recompute
  38. 2026-08-29 11:59 UTCGHSA enrichment
  39. 2026-08-28 21:42 UTCEPSS rescore
  40. 2026-08-28 17:27 UTCGHSA enrichment
  41. 2026-08-27 18:11 UTCEG score recompute
  42. 2026-08-27 18:11 UTCGHSA enrichment
  43. 2026-08-27 14:25 UTCEPSS rescore
  44. 2026-08-26 17:46 UTCEG score recompute
  45. 2026-08-26 17:46 UTCGHSA enrichment
  46. 2026-08-26 14:47 UTCEPSS rescore
  47. 2026-08-25 16:24 UTCEG score recompute
  48. 2026-08-25 15:30 UTCEG score recompute
  49. 2026-08-25 15:29 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-79775?
CVE-2026-79775 is a medium vulnerability published on August 25, 2026. rclone versions >= v1.72.0 and <= v1.74.4 (fixed in v1.75.0) contain multiple denial-of-service vulnerabilities in the archive backend's SquashFS parser, which relies on the github.com/diskfs/go-diskfs dependency. The parser fails to validate attacker-controlled superblock and metadata values…
When was CVE-2026-79775 disclosed?
CVE-2026-79775 was first published in the National Vulnerability Database on August 25, 2026, with the most recent update on September 10, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-79775 actively exploited?
CVE-2026-79775 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 76.4% of all scored CVEs.
What is the CVSS score of CVE-2026-79775?
CVE-2026-79775 has a CVSS v3 base score of 6.5 (NVD).
How do I remediate CVE-2026-79775?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-79775, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-79775

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