CVE-2026-79655

HIGHPre-NVD 7.87.8
EchelonGraph scoreMEDIUM confidence

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

Score 7.8 from GitHub Security Advisory (severity: HIGH) published 2026-08-25. A secondary CVSS source baseline 7.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: EPSS, GitHub Security Advisory, a secondary CVSS source
Trending — Patch released this weekElevated

Also known asEUVD-2026-65492 (ENISA EUVD) · GHSA-jhqm-m4j3-wqq2 (GitHub Security Advisories)Source: ENISA EUVD

7.8EG
EchelonGraph verdictPlan a fixRemediate within your standard update timelines at low or medium mission impact and sooner than that at high (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: 0.3%CVSS: 7.8Exploit: No code on recordExposed services: Not assessed

A fix is available — apply it.

A flaw was found in sos clean, a utility within the sos package. This vulnerability allows a local attacker to perform arbitrary file creation or overwrite. By crafting a malicious tar archive, an attacker can exploit a path traversal issue during tar extraction, where symlink and hardlink targets are not properly validated. This enables the attacker to write files to arbitrary locations on the system with the privileges of the sos clean process, which often runs as root.

CVSS v3
7.8
EG Score
7.8HIGHmedium confidence
EG Risk
51
EG Risk 51/100

EG Risk is EchelonGraph's 0–100 priority score. It fuses impact severity (EG Severity, the CVSS base score, never the KEV-floored or EPSS-lifted EG Score) with real-world exploitation and automatability, under weights EchelonGraph set by hand, so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner.

How it’s computed (value × EchelonGraph’s weight)
Severity78% × 45%
Impact severity (EG Severity): CVSS 7.8 of 10. Never the KEV-floored or EPSS-lifted EG Score.
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, Track* at medium and Attend at high mission impact.
Exploitation public PoC (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (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 at low or medium mission impact and sooner than that at high.
EPSS PROB
0.3%
EPSS %ILE
18th
KEV
Not listed

What the EG score is made of (scorer v4.0: the three questions the 0–10 score mixes, published apart · methodology)

The EG score (7.8): severity, escalated by confirmed exploitation. This CVE's 7.8 is its impact severity (EG Severity), not escalated.

EG Severity
7.8 HIGHCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.GitHub Security Advisory CVSS
EG Likelihood
0.3% within 30 daysSource: FIRST EPSS. FIRST's exploitation probability, not an EchelonGraph model.
Confirmed exploitation
None on record (CISA KEV, EG-KEV Tier 1)Reported apart from the likelihood: an observed fact, not a probability.
EG Priority
SSVC Track* at medium mission impactTrack at low, Track* at medium and Attend at high mission impact.CISA BOD 26-04: 14 days if the affected system is publicly exposed; Fix on system upgrade if it is not.Each input and its source, and whom BOD 26-04 binds: the SSVC and BOD 26-04 blocks below.

SSVC (CISA's decision table, applied by EchelonGraph)Track at low, Track* at medium and Attend at high mission impact.

A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.

Exploitation public PoC (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (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)14 days if the affected system is publicly exposed; Fix on system upgrade if it is not.

The score's inputs: In CISA KEV no (CISA's KEV catalog) · Automatable no (CISA Vulnrichment) · Technical impact total (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

November 11, 2026

Advisory Details (4)

Auto-updated Aug 25, 2026
Patch available. Sources: github_pr, redhat.
Web page

[cleaner] extract follows out-of-tree tar symlinks · Issue #4460 · sosreport/sos · GitHub

https://github.com/sosreport/sos/issues/4460
GitHub pull request

[cleaner] refuse out-of-tree tar members on extract

Upstream fix in progress (PR #4461 · sosreport/sos, state=open)

https://github.com/sosreport/sos/pull/4461
Red Hat

2523363 – (CVE-2026-79655) CVE-2026-79655 sos: sos: path traversal in sos clean tar extraction via unvalidated symlink/hardlink targets leads to arbitrary file write

https://bugzilla.redhat.com/show_bug.cgi?id=2523363
Red HatMentions a patch (unverified)

CVE-2026-79655 - Red Hat Customer Portal

Affected: Red Hat Enterprise Linux 8 or OpenShift Container Platform 4, is affected by this vulnerability and a fix may be released to a

https://access.redhat.com/security/cve/CVE-2026-79655

Patch Availability(1)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
redhatsos-0:4.11.2-7.el9_92026-11-10redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Affected Packages

(2 across 2 ecosystems)
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
sos4.10.0-1 ... 4.9.2-3 (25 versions)
  • every version on: no fix on record
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
sos4.10.0-1 ... 4.9.2-3 (23 versions)
  • every version up to 4.12.0-2: fixed in 4.12.0-2
—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 13× in last 7d / 45× 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 its CVE.org record (CNA or CISA ADP). 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). "EchelonGraph re-scored" is our own recompute of this CVE's score, not an update from a source, and is not counted in the refreshes above. Most recent first.

Showing the most recent 100 of 296 rows 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. None are among the latest 100 rows. The 196 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-11-12 16:34 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  2. 2026-11-11 16:40 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  3. 2026-11-11 09:27 UTCEchelonGraph re-scored
  4. 2026-11-11 09:27 UTCVendor advisory
  5. 2026-11-11 09:27 UTCGHSA enrichmentGHSA-jhqm-m4j3-wqq2 · GitHub severity HIGH · GitHub CVSS 7.8
  6. 2026-11-11 08:44 UTCEchelonGraph re-scored
  7. 2026-11-11 08:44 UTCVendor advisory
  8. 2026-11-11 08:44 UTCGHSA enrichmentGHSA-jhqm-m4j3-wqq2 · GitHub severity HIGH · GitHub CVSS 7.8
  9. 2026-11-10 23:28 UTCEchelonGraph re-scored
  10. 2026-11-10 23:28 UTCGHSA enrichmentGHSA-jhqm-m4j3-wqq2 · GitHub severity HIGH · GitHub CVSS 7.8
  11. 2026-11-10 22:30 UTCEchelonGraph re-scored
  12. 2026-11-10 22:30 UTCGHSA enrichmentGHSA-jhqm-m4j3-wqq2 · GitHub severity HIGH · GitHub CVSS 7.8
  13. 2026-11-10 16:45 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  14. 2026-11-09 16:36 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  15. 2026-11-08 16:41 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  16. 2026-11-07 16:39 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  17. 2026-11-06 16:39 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  18. 2026-11-05 16:38 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  19. 2026-11-05 00:27 UTCEchelonGraph re-scored
  20. 2026-11-05 00:27 UTCVendor advisory
  21. 2026-11-05 00:27 UTCGHSA enrichmentGHSA-jhqm-m4j3-wqq2 · GitHub severity HIGH · GitHub CVSS 7.8
  22. 2026-11-04 23:45 UTCEchelonGraph re-scored
  23. 2026-11-04 23:45 UTCVendor advisory
  24. 2026-11-04 23:45 UTCGHSA enrichmentGHSA-jhqm-m4j3-wqq2 · GitHub severity HIGH · GitHub CVSS 7.8
  25. 2026-11-04 16:36 UTCEPSS rescoreEPSS 0.2% · 11th percentile
Show 75 more
  1. 2026-11-03 21:01 UTCEchelonGraph re-scored
  2. 2026-11-03 21:01 UTCVendor advisory
  3. 2026-11-03 21:01 UTCGHSA enrichmentGHSA-jhqm-m4j3-wqq2 · GitHub severity HIGH · GitHub CVSS 7.8
  4. 2026-11-03 16:49 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  5. 2026-11-02 16:46 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  6. 2026-11-01 16:35 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  7. 2026-10-31 16:33 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  8. 2026-10-30 16:35 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  9. 2026-10-29 16:34 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  10. 2026-10-28 16:33 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  11. 2026-10-27 19:55 UTCEchelonGraph re-scored
  12. 2026-10-27 19:55 UTCGHSA enrichmentGHSA-jhqm-m4j3-wqq2 · GitHub severity HIGH · GitHub CVSS 7.8
  13. 2026-10-27 16:32 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  14. 2026-10-26 16:32 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  15. 2026-10-25 16:34 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  16. 2026-10-25 13:59 UTCEchelonGraph re-scored
  17. 2026-10-24 16:33 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  18. 2026-10-23 16:32 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  19. 2026-10-22 16:35 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  20. 2026-10-21 16:33 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  21. 2026-10-20 16:33 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  22. 2026-10-20 07:59 UTCEchelonGraph re-scored
  23. 2026-10-20 07:59 UTCVendor advisory
  24. 2026-10-20 07:59 UTCGHSA enrichmentGHSA-jhqm-m4j3-wqq2 · GitHub severity HIGH · GitHub CVSS 7.8
  25. 2026-10-19 16:33 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  26. 2026-10-18 16:33 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  27. 2026-10-18 03:10 UTCEchelonGraph re-scored
  28. 2026-10-17 16:35 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  29. 2026-10-16 16:44 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  30. 2026-10-15 16:33 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  31. 2026-10-14 16:33 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  32. 2026-10-13 16:35 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  33. 2026-10-13 06:37 UTCEchelonGraph re-scored
  34. 2026-10-13 06:37 UTCVendor advisory
  35. 2026-10-13 06:37 UTCGHSA enrichmentGHSA-jhqm-m4j3-wqq2 · GitHub severity HIGH · GitHub CVSS 7.8
  36. 2026-10-12 16:35 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  37. 2026-10-12 14:58 UTCEchelonGraph re-scored
  38. 2026-10-11 19:22 UTCEchelonGraph re-scored
  39. 2026-10-11 16:38 UTCEchelonGraph re-scored
  40. 2026-10-11 13:56 UTCEchelonGraph re-scored
  41. 2026-10-11 13:49 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  42. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  43. 2026-10-10 12:07 UTCEchelonGraph re-scored
  44. 2026-10-10 12:07 UTCVendor advisory
  45. 2026-10-10 12:06 UTCGHSA enrichmentGHSA-jhqm-m4j3-wqq2 · GitHub severity HIGH · GitHub CVSS 7.8
  46. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  47. 2026-10-09 04:25 UTCEchelonGraph re-scored
  48. 2026-10-09 04:25 UTCVendor advisory
  49. 2026-10-09 04:24 UTCGHSA enrichmentGHSA-jhqm-m4j3-wqq2 · GitHub severity HIGH · GitHub CVSS 7.8
  50. 2026-10-08 17:13 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  51. 2026-10-08 03:19 UTCEchelonGraph re-scored
  52. 2026-10-08 03:19 UTCVendor advisory
  53. 2026-10-08 03:19 UTCGHSA enrichmentGHSA-jhqm-m4j3-wqq2 · GitHub severity HIGH · GitHub CVSS 7.8
  54. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  55. 2026-10-07 08:46 UTCVendor advisory
  56. 2026-10-07 08:46 UTCGHSA enrichmentGHSA-jhqm-m4j3-wqq2 · GitHub severity HIGH · GitHub CVSS 7.8
  57. 2026-10-06 20:45 UTCEchelonGraph re-scored
  58. 2026-10-06 20:45 UTCVendor advisory
  59. 2026-10-06 20:45 UTCGHSA enrichmentGHSA-jhqm-m4j3-wqq2 · GitHub severity HIGH · GitHub CVSS 7.8
  60. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  61. 2026-10-06 08:27 UTCEchelonGraph re-scored
  62. 2026-10-06 08:27 UTCVendor advisory
  63. 2026-10-06 08:27 UTCGHSA enrichmentGHSA-jhqm-m4j3-wqq2 · GitHub severity HIGH · GitHub CVSS 7.8
  64. 2026-10-06 07:36 UTCEchelonGraph re-scored
  65. 2026-10-06 07:36 UTCVendor advisory
  66. 2026-10-06 07:36 UTCGHSA enrichmentGHSA-jhqm-m4j3-wqq2 · GitHub severity HIGH · GitHub CVSS 7.8
  67. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  68. 2026-10-05 17:01 UTCVendor advisory
  69. 2026-10-05 17:01 UTCGHSA enrichmentGHSA-jhqm-m4j3-wqq2 · GitHub severity HIGH · GitHub CVSS 7.8
  70. 2026-10-05 04:42 UTCEchelonGraph re-scored
  71. 2026-10-05 04:42 UTCVendor advisory
  72. 2026-10-05 04:42 UTCGHSA enrichmentGHSA-jhqm-m4j3-wqq2 · GitHub severity HIGH · GitHub CVSS 7.8
  73. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  74. 2026-10-04 16:13 UTCVendor advisory
  75. 2026-10-04 16:13 UTCGHSA enrichmentGHSA-jhqm-m4j3-wqq2 · GitHub severity HIGH · GitHub CVSS 7.8

Frequently asked(5)

What is CVE-2026-79655?
CVE-2026-79655 is a high-severity vulnerability; its CVE record was published on August 25, 2026. A flaw was found in sos clean, a utility within the sos package. This vulnerability allows a local attacker to perform arbitrary file creation or overwrite. By crafting a malicious tar archive, an attacker can exploit a path traversal issue during tar extraction, where symlink and hardlink targets…
When was CVE-2026-79655 made public?
CVE-2026-79655 was made public on August 21, 2026: that is the date its CVE record's CNA, Red Hat, Inc., 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 November 11, 2026; the record at its source may have been updated since.
Is CVE-2026-79655 actively exploited?
CVE-2026-79655 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.3% probability of exploitation in the next 30 days (18th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-79655?
CVE-2026-79655 has a CVSS base score of 7.8 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-79655?
A fix for CVE-2026-79655 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-79655 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-79655

Explore →

Is Your Infrastructure Affected by CVE-2026-79655?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.