CVE-2026-79780

MEDIUMPre-NVD 5.35.3
EchelonGraph scoreMEDIUM confidence

“—” beside the score: it is equal to the CVSS score beside it.

Score 5.3 from GitHub Security Advisory published 2026-08-25. A secondary CVSS source baseline 5.3; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: EPSS, GitHub Security Advisory, a secondary CVSS source
Trending — 3 sources updated this weekElevated
5.3EG
EchelonGraph verdictPlan a fixRemediate within your standard update timelines (the SSVC decision on this page).
  • CISA's Vulnrichment rates exploitation as PoC; EchelonGraph holds no exploit-code reference for it
CISA-KEV: Not listedEPSS PROB: 0.1%CVSS: 5.3Exploit: No code on recordExposed services: Not assessed

A fix is available — apply it.

rclone before v1.75.0 fails to sanitize IBM IAM bearer tokens and SSE-C encryption keys during S3 redirect callbacks, allowing credentials to be preserved across scheme or host changes. Attackers observing network traffic from a trusted endpoint can capture reusable IBM IAM tokens on same-host HTTPS-to-HTTP downgrades or SSE-C keys on cross-origin redirects to access protected S3 objects.

CVSS v3
5.3
EG Score
5.3MEDIUMmedium confidence
EG Risk
40
EG Risk 40/100

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 (value × EchelonGraph’s weight)
Severity53% × 45%
The EG Score, 5.3 of 10.
Exploitation40% × 40%
EchelonGraph's fixed weight for EG-KEV Tier 3 (Elevated): a constant, not a probability.
Automatability0% × 15%
CISA's SSVC Automatable value: no (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Track* at high (mission-essential systems).
Exploitation public PoC (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.
Action: A fix is available. Apply it within your standard update timelines.
EPSS PROB
0.1%
EPSS %ILE
3rd
KEV
Not listed

SSVC (CISA's decision table, applied by EchelonGraph)Track at low or medium mission impact; Track* at high (mission-essential systems).

A fix is available. Apply it within your standard update timelines.

Exploitation public PoC (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table

BOD 26-04 (CISA's remediation timeline, Table 1)60 days if the affected system is publicly exposed; Fix on system upgrade if it is not.

In CISA KEV no (CISA's KEV catalog) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it

Published

August 25, 2026

Last Modified

September 10, 2026

Advisory Details (1)

Auto-updated Aug 25, 2026
Patch available. Sources: github.
GitHub advisoryMentions a patch (unverified)

S3 Redirect Sanitization Omits IBM IAM Bearer Tokens and SSE-C Keys · Advisory · rclone/rclone · GitHub

https://github.com/rclone/rclone/security/advisories/GHSA-8mxv-9xhp-86h4

Vendor Advisories for CVE-2026-79780(1)

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

Affected Packages

(3 across 3 ecosystems)
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
rclone1.60.1+dfsg-2 ... 1.69.3+dfsg-3 (8 versions)
  • every version on: no fix on record
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
rclone1.60.1+dfsg-4 ... 1.69.3+dfsg-3 (6 versions)
  • every version on: no fix on record
—
Go(1)
PackageVulnerable rangeFix by version rangeDependents
github.com/rclone/rclone—
  • every version up to 1.75.0: fixed in 1.75.0
—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 17× in last 7d / 79× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. 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. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.

Showing the most recent 98 of 127 refreshes on record for this CVE.

A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. 2 repeat rows among the latest 100 are merged into the row they repeat. The 29 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-13 16:35 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  2. 2026-10-12 16:14 UTCEG score recompute
  3. 2026-10-12 16:14 UTCGHSA enrichmentGHSA-fj78-v5f5-cphq · GitHub CVSS 5.3
  4. 2026-10-12 14:58 UTCEG score recompute
  5. 2026-10-11 19:22 UTCEG score recompute
  6. 2026-10-11 16:38 UTCEG score recompute
  7. 2026-10-11 13:56 UTCEG score recompute
  8. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  9. 2026-10-10 12:02 UTCEG score recompute
  10. 2026-10-10 12:02 UTCGHSA enrichmentGHSA-fj78-v5f5-cphq · GitHub CVSS 5.3
  11. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  12. 2026-10-09 04:23 UTCEG score recompute
  13. 2026-10-09 04:23 UTCGHSA enrichmentGHSA-fj78-v5f5-cphq · GitHub CVSS 5.3
  14. 2026-10-08 17:13 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  15. 2026-10-08 03:16 UTCEG score recompute
  16. 2026-10-08 03:16 UTCGHSA enrichmentGHSA-fj78-v5f5-cphq · GitHub CVSS 5.3
  17. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  18. 2026-10-07 02:11 UTCEG score recompute
  19. 2026-10-07 02:11 UTCGHSA enrichmentGHSA-fj78-v5f5-cphq · GitHub CVSS 5.3
  20. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  21. 2026-10-06 02:50 UTCEG score recompute
  22. 2026-10-06 02:50 UTCGHSA enrichmentGHSA-fj78-v5f5-cphq · GitHub CVSS 5.3
  23. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  24. 2026-10-05 03:57 UTCEG score recompute
  25. 2026-10-05 03:57 UTCGHSA enrichmentGHSA-fj78-v5f5-cphq · GitHub CVSS 5.3
Show 73 more
  1. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  2. 2026-10-04 04:12 UTCEG score recompute
  3. 2026-10-04 04:12 UTCGHSA enrichmentGHSA-fj78-v5f5-cphq · GitHub CVSS 5.3
  4. 2026-10-03 14:26 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  5. 2026-10-03 05:20 UTCEG score recompute
  6. 2026-10-03 05:20 UTCGHSA enrichmentGHSA-fj78-v5f5-cphq · GitHub CVSS 5.3
  7. 2026-10-02 17:57 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  8. 2026-10-02 06:28 UTCEG score recompute
  9. 2026-10-02 06:28 UTCGHSA enrichmentGHSA-fj78-v5f5-cphq · GitHub CVSS 5.3
  10. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  11. 2026-10-01 05:39 UTCEG score recompute
  12. 2026-10-01 05:39 UTCGHSA enrichmentGHSA-fj78-v5f5-cphq · GitHub CVSS 5.3
  13. 2026-09-30 06:47 UTCEG score recompute
  14. 2026-09-30 06:47 UTCGHSA enrichmentGHSA-fj78-v5f5-cphq · GitHub CVSS 5.3
  15. 2026-09-29 15:24 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  16. 2026-09-28 21:30 UTCEG score recompute
  17. 2026-09-28 21:30 UTCGHSA enrichmentGHSA-fj78-v5f5-cphq · GitHub CVSS 5.3
  18. 2026-09-28 13:52 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  19. 2026-09-27 20:57 UTCEG score recompute
  20. 2026-09-27 20:57 UTCGHSA enrichmentGHSA-fj78-v5f5-cphq · GitHub CVSS 5.3
  21. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  22. 2026-09-26 22:05 UTCEG score recompute
  23. 2026-09-26 22:05 UTCGHSA enrichmentGHSA-fj78-v5f5-cphq · GitHub CVSS 5.3
  24. 2026-09-26 15:59 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  25. 2026-09-26 00:28 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  26. 2026-09-25 04:33 UTCEG score recompute
  27. 2026-09-25 04:33 UTCGHSA enrichmentGHSA-fj78-v5f5-cphq · GitHub CVSS 5.3
  28. 2026-09-24 14:04 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  29. 2026-09-24 05:40 UTCEG score recompute
  30. 2026-09-24 05:40 UTCGHSA enrichmentGHSA-fj78-v5f5-cphq · GitHub CVSS 5.3
  31. 2026-09-23 17:54 UTCEPSS rescoreEPSS <0.1% · below the 1st percentile
  32. 2026-09-23 06:48 UTCEG score recompute
  33. 2026-09-23 06:48 UTCGHSA enrichmentGHSA-fj78-v5f5-cphq · GitHub CVSS 5.3
  34. 2026-09-22 16:01 UTCEPSS rescoreEPSS <0.1% · below the 1st percentile
  35. 2026-09-22 07:55 UTCEG score recompute
  36. 2026-09-22 07:55 UTCGHSA enrichmentGHSA-fj78-v5f5-cphq · GitHub CVSS 5.3
  37. 2026-09-21 21:09 UTCEPSS rescoreEPSS <0.1% · below the 1st percentile
  38. 2026-09-21 09:02 UTCGHSA enrichmentGHSA-fj78-v5f5-cphq · GitHub CVSS 5.3
  39. 2026-09-20 10:10 UTCEG score recompute
  40. 2026-09-20 10:10 UTCGHSA enrichmentGHSA-fj78-v5f5-cphq · GitHub CVSS 5.3
  41. 2026-09-19 11:17 UTCEG score recompute
  42. 2026-09-19 11:17 UTCGHSA enrichmentGHSA-fj78-v5f5-cphq · GitHub CVSS 5.3
  43. 2026-09-18 19:28 UTCEPSS rescoreEPSS <0.1% · below the 1st percentile
  44. 2026-09-18 12:25 UTCEG score recompute
  45. 2026-09-18 12:25 UTCGHSA enrichmentGHSA-fj78-v5f5-cphq · GitHub CVSS 5.3
  46. 2026-09-17 13:31 UTCGHSA enrichmentGHSA-fj78-v5f5-cphq · GitHub CVSS 5.3
  47. 2026-09-16 14:35 UTCEG score recompute
  48. 2026-09-16 14:35 UTCGHSA enrichmentGHSA-fj78-v5f5-cphq · GitHub CVSS 5.3
  49. 2026-09-16 14:08 UTCEPSS rescoreEPSS <0.1% · below the 1st percentile
  50. 2026-09-16 05:15 UTCEPSS rescoreEPSS <0.1% · below the 1st percentile
  51. 2026-09-15 15:42 UTCEG score recompute
  52. 2026-09-15 15:42 UTCGHSA enrichmentGHSA-fj78-v5f5-cphq · GitHub CVSS 5.3
  53. 2026-09-15 03:12 UTCEPSS rescoreEPSS <0.1% · below the 1st percentile
  54. 2026-09-14 16:49 UTCGHSA enrichmentGHSA-fj78-v5f5-cphq · GitHub CVSS 5.3
  55. 2026-09-13 17:57 UTCEG score recompute
  56. 2026-09-13 17:57 UTCGHSA enrichmentGHSA-fj78-v5f5-cphq · GitHub CVSS 5.3
  57. 2026-09-12 19:05 UTCGHSA enrichmentGHSA-fj78-v5f5-cphq · GitHub CVSS 5.3
  58. 2026-09-11 20:12 UTCEG score recompute
  59. 2026-09-11 20:12 UTCGHSA enrichmentGHSA-fj78-v5f5-cphq · GitHub CVSS 5.3
  60. 2026-09-11 14:53 UTCEPSS rescoreEPSS <0.1% · below the 1st percentile
  61. 2026-09-10 20:59 UTCEG score recompute
  62. 2026-09-10 20:59 UTCGHSA enrichmentGHSA-fj78-v5f5-cphq · GitHub CVSS 5.3
  63. 2026-09-10 00:31 UTCGHSA enrichmentGHSA-fj78-v5f5-cphq · GitHub CVSS 5.3
  64. 2026-09-09 01:37 UTCEG score recompute
  65. 2026-09-09 01:37 UTCGHSA enrichmentGHSA-fj78-v5f5-cphq · GitHub CVSS 5.3
  66. 2026-09-08 22:01 UTCEPSS rescoreEPSS <0.1% · below the 1st percentile
  67. 2026-09-08 02:44 UTCEG score recompute
  68. 2026-09-08 02:43 UTCGHSA enrichmentGHSA-fj78-v5f5-cphq · GitHub CVSS 5.3
  69. 2026-09-07 03:51 UTCEG score recompute
  70. 2026-09-07 03:51 UTCGHSA enrichmentGHSA-fj78-v5f5-cphq · GitHub CVSS 5.3
  71. 2026-09-06 13:48 UTCEPSS rescoreEPSS <0.1% · below the 1st percentile
  72. 2026-09-06 04:57 UTCEG score recompute
  73. 2026-09-06 04:57 UTCGHSA enrichmentGHSA-fj78-v5f5-cphq · GitHub CVSS 5.3

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Frequently asked(5)

What is CVE-2026-79780?
CVE-2026-79780 is a medium-severity vulnerability; its CVE record was published on August 25, 2026. rclone before v1.75.0 fails to sanitize IBM IAM bearer tokens and SSE-C encryption keys during S3 redirect callbacks, allowing credentials to be preserved across scheme or host changes. Attackers observing network traffic from a trusted endpoint can capture reusable IBM IAM tokens on same-host…
When was CVE-2026-79780 made public?
CVE-2026-79780 was made public on July 31, 2026: that is the date its CVE record's CNA, VulnCheck, gives for when the vulnerability was made public. The CVE record itself was published on August 25, 2026. EchelonGraph's copy of the record carries a last-modified date of September 10, 2026; the record at its source may have been updated since.
Is CVE-2026-79780 actively exploited?
CVE-2026-79780 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.1% probability of exploitation in the next 30 days (3rd percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-79780?
CVE-2026-79780 has a CVSS base score of 5.3 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-79780?
A fix for CVE-2026-79780 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-79780 are linked in the Vendor Advisories panel on this page.

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