CVE-2026-71310

MEDIUMPre-NVD 5.95.9—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 5.9 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.4%, top 69% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, secondary
Elevated
5.9EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 5.9Exploit: Elevated riskExposed: 0

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

rclone is a command-line program to sync files and directories to and from different cloud storage providers. Prior to 1.75.0, the shared HTTP CONNECT helper in lib/proxy/http.go parses proxy CONNECT responses with http.ReadResponse over an unrestricted buffered reader, allowing a malicious or compromised configured proxy, or an active on-path actor controlling a plaintext HTTP proxy hop, to send oversized headers that grow memory until the rclone process fails. The affected helper is used by FTP and SFTP proxy connections, and SFTP reaches the parser before SSH server authentication, so target host key validation does not constrain a malicious proxy. This issue is fixed in 1.75.0.

CVSS v3
5.9
EG Score
5.9(medium)
EG Risk
43(Track)
EG Risk 43/100SSVC: 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
Severity59% × 45%
Exploitation40% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
31%
KEV
Not listed

Published

August 5, 2026

Last Modified

August 6, 2026

Advisory Details (3)

Auto-updated Aug 5, 2026
Patch available. Sources: github_commit, github_release, github.
github_release Patch Available

rclone v1.75.0

Patch available: rclone/rclone v1.75.0

https://github.com/rclone/rclone/releases/tag/v1.75.0
github_commit

commit 21d8cd3b92cd (rclone/rclone)

Fix landed in rclone/rclone commit 21d8cd3b92cd — awaiting tagged release

https://github.com/rclone/rclone/commit/21d8cd3b92cd81d987f485051d454ea675d91a2b
github Patch Available

Unbounded HTTP CONNECT Response Headers Can Exhaust rclone Memory · Advisory · rclone/rclone · GitHub

https://github.com/rclone/rclone/security/advisories/GHSA-xhf4-832v-7xcr

Vendor Advisories for CVE-2026-71310(1)

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

Affected Packages

(4 across 4 ecosystems)
Debian:11(1)
PackageVulnerable rangeFixed inDependents
rclone1.53.3-1 ... 1.69.3+dfsg-3 (13 versions)——
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)——
Go(1)
PackageVulnerable rangeFixed inDependents
github.com/rclone/rclone—1.75.0—

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 15× in last 7d / 33× 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. 2026-08-21 06:58 UTCEG score recompute
  2. 2026-08-20 22:56 UTCEPSS rescore
  3. 2026-08-20 08:56 UTCEG score recompute
  4. 2026-08-19 17:04 UTCEPSS rescore
  5. 2026-08-19 10:54 UTCEG score recompute
  6. 2026-08-18 13:49 UTCEPSS rescore
  7. 2026-08-18 13:49 UTCEPSS rescore
  8. 2026-08-17 14:49 UTCEG score recompute
  9. 2026-08-17 13:47 UTCEPSS rescore
  10. 2026-08-16 16:47 UTCEG score recompute
  11. 2026-08-16 14:56 UTCEPSS rescore
  12. 2026-08-16 14:56 UTCEPSS rescore
  13. 2026-08-16 02:15 UTCEPSS rescore
  14. 2026-08-15 18:46 UTCEG score recompute
  15. 2026-08-15 01:31 UTCEPSS rescore
  16. 2026-08-13 22:42 UTCEG score recompute
  17. 2026-08-13 22:00 UTCEPSS rescore
  18. 2026-08-13 00:40 UTCEG score recompute
  19. 2026-08-12 13:51 UTCEPSS rescore
  20. 2026-08-12 02:38 UTCEG score recompute
  21. 2026-08-11 04:36 UTCEG score recompute
  22. 2026-08-11 00:00 UTCEPSS rescore
  23. 2026-08-10 06:34 UTCEG score recompute
  24. 2026-08-09 13:47 UTCEPSS rescore
  25. 2026-08-09 08:33 UTCEG score recompute
Show 8 more
  1. 2026-08-08 16:37 UTCEPSS rescore
  2. 2026-08-08 10:31 UTCEG score recompute
  3. 2026-08-06 14:28 UTCEG score recompute
  4. 2026-08-06 13:53 UTCEG score recompute
  5. 2026-08-06 13:47 UTCEPSS rescore
  6. 2026-08-05 21:17 UTCEG score recompute
  7. 2026-08-05 20:45 UTCEG score recompute
  8. 2026-08-05 20:45 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-71310?
CVE-2026-71310 is a medium vulnerability published on August 5, 2026. rclone is a command-line program to sync files and directories to and from different cloud storage providers. Prior to 1.75.0, the shared HTTP CONNECT helper in lib/proxy/http.go parses proxy CONNECT responses with http.ReadResponse over an unrestricted buffered reader, allowing a malicious or…
When was CVE-2026-71310 disclosed?
CVE-2026-71310 was first published in the National Vulnerability Database on August 5, 2026, with the most recent update on August 6, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-71310 actively exploited?
CVE-2026-71310 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 69.4% of all scored CVEs.
What is the CVSS score of CVE-2026-71310?
CVE-2026-71310 has a CVSS v3 base score of 5.9 (NVD).
How do I remediate CVE-2026-71310?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-71310, 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-2026-71310

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