CVE-2026-79655

HIGHPre-NVD 7.87.8—
EchelonGraph scoreHIGH confidence

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, ghsa, secondary
Trending — 4 sources updated this weekElevated
7.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.8Exploit: Elevated riskExposed: 0

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

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
7.8(high)
EG Risk
51(Track*)
EG Risk 51/100SSVC: 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
Severity78% × 45%
Exploitation40% × 40%
Automatability0% × 15%
Action: Watch closely — could escalate to Attend.
EPSS PROB
0%
EPSS %ILE
4%
KEV
Not listed

Published

August 25, 2026

Last Modified

August 28, 2026

Advisory Details (4)

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

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

https://github.com/sosreport/sos/issues/4460
github_pr

[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
redhat

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
redhat Patch Available

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

Vendor Advisories for CVE-2026-79655(1)

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

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 21× in last 7d / 21× 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. 2026-08-30 01:22 UTCEPSS rescore
  2. 2026-08-29 21:05 UTCGHSA enrichment
  3. 2026-08-29 09:15 UTCEG score recompute
  4. 2026-08-29 09:15 UTCGHSA enrichment
  5. 2026-08-28 21:42 UTCEPSS rescore
  6. 2026-08-28 21:25 UTCGHSA enrichment
  7. 2026-08-28 13:19 UTCGHSA enrichment
  8. 2026-08-28 01:29 UTCEG score recompute
  9. 2026-08-28 01:29 UTCGHSA enrichment
  10. 2026-08-27 14:25 UTCEPSS rescore
  11. 2026-08-27 13:40 UTCGHSA enrichment
  12. 2026-08-27 01:50 UTCEG score recompute
  13. 2026-08-27 01:50 UTCGHSA enrichment
  14. 2026-08-26 14:47 UTCEPSS rescore
  15. 2026-08-26 14:00 UTCGHSA enrichment
  16. 2026-08-26 02:10 UTCEG score recompute
  17. 2026-08-26 02:10 UTCGHSA enrichment
  18. 2026-08-25 14:21 UTCEG score recompute
  19. 2026-08-25 14:15 UTCEG score recompute
  20. 2026-08-25 14:00 UTCEG score recompute
  21. 2026-08-25 13:59 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-79655?
CVE-2026-79655 is a high vulnerability 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 disclosed?
CVE-2026-79655 was first published in the National Vulnerability Database on August 25, 2026, with the most recent update on August 28, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-79655 actively exploited?
CVE-2026-79655 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 96.2% of all scored CVEs.
What is the CVSS score of CVE-2026-79655?
CVE-2026-79655 has a CVSS v3 base score of 7.8 (NVD).
How do I remediate CVE-2026-79655?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-79655, 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

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