CVE-2026-79705

MEDIUMPre-NVD 4.54.5
EchelonGraph scoreMEDIUM confidence

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

Score 4.5 from GitHub Security Advisory published 2026-09-15. The CNA's CVSS baseline 4.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: the CNA's CVSS, EPSS, GitHub Security Advisory
Trending — 4 sources updated this week

Also known asEUVD-2026-78823 (ENISA EUVD) · GHSA-fmxx-r7q4-v8m6 (GitHub Security Advisories)Source: ENISA EUVD

4.5EG
EchelonGraph verdictMonitorRemediate within your standard update timelines (the SSVC decision on this page).
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.4%CVSS: 4.5Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

A flaw was found in the buildah/copier Go package. When used outside of Buildah by a non-root caller, a crafted tar archive containing malicious symlinks can escape the target extraction directory and create files outside the intended destination. Buildah itself uses chroot hardening and is not affected.

CVSS v3
4.5
EG Score
4.5MEDIUMmedium confidence
EG Risk
20
EG Risk 20/100

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)
Severity45% × 45%
Impact severity (EG Severity): CVSS 4.5 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation0.4% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
Automatability0% × 15%
CISA's SSVC Automatable value: no (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at every mission impact level.
Exploitation none (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
0.4%
EPSS %ILE
35th
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 (4.5): severity, escalated by confirmed exploitation. This CVE's 4.5 is its impact severity (EG Severity), not escalated.

EG Severity
4.5 MEDIUMCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.GitHub Security Advisory CVSS
EG Likelihood
0.4% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-10-31). 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 every mission impact level.CISA BOD 26-04: 60 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 every mission impact level.

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

Exploitation none (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.

The score's inputs: 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

September 15, 2026

Last Modified

November 1, 2026

Advisory Details (2)

Auto-updated Sep 15, 2026
Patch available. Sources: redhat.
Red Hat

2523419 – (CVE-2026-79705) CVE-2026-79705 podman: buildah: buildah/copier: Directory escape via crafted tar symlinks when used outside Buildah by non-root callers

https://bugzilla.redhat.com/show_bug.cgi?id=2523419
Red HatMentions a patch (unverified)

CVE-2026-79705 - Red Hat Customer Portal

Affected: Red Hat Enterprise Linux 10\",\"advisory\":[],\"package\":\"podman\",\"state\":\"Fix deferred\",\"lifecycle_url\":\"https://acc

https://access.redhat.com/security/cve/CVE-2026-79705

Patch Availability(1)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
redhatpodman-main-6.1.3-1.hum12026-10-02redhat

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

(3 across 3 ecosystems)
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
golang-github-containers-buildah1.28.2+ds1-3 ... 1.45.0+ds1-2 (59 versions)
  • every version on: no fix on record
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
golang-github-containers-buildah1.39.3+ds1-1 ... 1.45.0+ds1-2 (20 versions)
  • every version on: no fix on record
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
golang-github-containers-buildah1.39.3+ds1-1 ... 1.45.0+ds1-2 (20 versions)
  • every version on: no fix on record
—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 16× in last 7d / 69× 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 100 of 142 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. None are among the latest 100 rows. The 42 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-11-01 16:35 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  2. 2026-11-01 05:18 UTCEG score recompute
  3. 2026-11-01 05:18 UTCVendor advisory
  4. 2026-11-01 05:18 UTCGHSA enrichmentGHSA-fmxx-r7q4-v8m6 · GitHub CVSS 4.5
  5. 2026-10-31 16:33 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  6. 2026-10-30 16:35 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  7. 2026-10-30 08:26 UTCEG score recompute
  8. 2026-10-30 08:26 UTCVendor advisory
  9. 2026-10-30 08:26 UTCGHSA enrichmentGHSA-fmxx-r7q4-v8m6 · GitHub CVSS 4.5
  10. 2026-10-30 07:31 UTCEG score recompute
  11. 2026-10-30 07:31 UTCVendor advisory
  12. 2026-10-30 07:31 UTCGHSA enrichmentGHSA-fmxx-r7q4-v8m6 · GitHub CVSS 4.5
  13. 2026-10-29 16:34 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  14. 2026-10-28 16:33 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  15. 2026-10-27 16:32 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  16. 2026-10-26 16:32 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  17. 2026-10-25 16:34 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  18. 2026-10-25 13:59 UTCEG score recompute
  19. 2026-10-24 16:33 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  20. 2026-10-23 16:32 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  21. 2026-10-22 16:35 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  22. 2026-10-21 16:33 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  23. 2026-10-20 16:33 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  24. 2026-10-19 16:33 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  25. 2026-10-18 16:33 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
Show 75 more
  1. 2026-10-18 03:10 UTCEG score recompute
  2. 2026-10-17 16:35 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  3. 2026-10-16 16:44 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  4. 2026-10-15 18:38 UTCEG score recompute
  5. 2026-10-15 18:38 UTCVendor advisory
  6. 2026-10-15 18:38 UTCGHSA enrichmentGHSA-fmxx-r7q4-v8m6 · GitHub CVSS 4.5
  7. 2026-10-15 16:33 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  8. 2026-10-14 16:33 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  9. 2026-10-13 16:35 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  10. 2026-10-12 16:35 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  11. 2026-10-12 14:58 UTCEG score recompute
  12. 2026-10-11 19:22 UTCEG score recompute
  13. 2026-10-11 16:38 UTCEG score recompute
  14. 2026-10-11 13:56 UTCEG score recompute
  15. 2026-10-11 13:49 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  16. 2026-10-11 05:39 UTCEG score recompute
  17. 2026-10-11 05:39 UTCVendor advisory
  18. 2026-10-11 05:39 UTCGHSA enrichmentGHSA-fmxx-r7q4-v8m6 · GitHub CVSS 4.5
  19. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  20. 2026-10-09 23:31 UTCEG score recompute
  21. 2026-10-09 23:31 UTCVendor advisory
  22. 2026-10-09 23:31 UTCGHSA enrichmentGHSA-fmxx-r7q4-v8m6 · GitHub CVSS 4.5
  23. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  24. 2026-10-08 22:37 UTCEG score recompute
  25. 2026-10-08 22:37 UTCVendor advisory
  26. 2026-10-08 22:37 UTCGHSA enrichmentGHSA-fmxx-r7q4-v8m6 · GitHub CVSS 4.5
  27. 2026-10-08 17:13 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  28. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  29. 2026-10-07 20:05 UTCVendor advisory
  30. 2026-10-07 20:05 UTCGHSA enrichmentGHSA-fmxx-r7q4-v8m6 · GitHub CVSS 4.5
  31. 2026-10-06 19:10 UTCEG score recompute
  32. 2026-10-06 19:10 UTCVendor advisory
  33. 2026-10-06 19:10 UTCGHSA enrichmentGHSA-fmxx-r7q4-v8m6 · GitHub CVSS 4.5
  34. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  35. 2026-10-05 18:16 UTCEG score recompute
  36. 2026-10-05 18:16 UTCVendor advisory
  37. 2026-10-05 18:16 UTCGHSA enrichmentGHSA-fmxx-r7q4-v8m6 · GitHub CVSS 4.5
  38. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  39. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  40. 2026-10-04 17:17 UTCVendor advisory
  41. 2026-10-04 17:17 UTCGHSA enrichmentGHSA-fmxx-r7q4-v8m6 · GitHub CVSS 4.5
  42. 2026-10-03 16:19 UTCEG score recompute
  43. 2026-10-03 16:19 UTCVendor advisory
  44. 2026-10-03 16:19 UTCGHSA enrichmentGHSA-fmxx-r7q4-v8m6 · GitHub CVSS 4.5
  45. 2026-10-03 14:26 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  46. 2026-10-02 17:57 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  47. 2026-10-02 15:26 UTCEG score recompute
  48. 2026-10-02 15:26 UTCVendor advisory
  49. 2026-10-02 15:26 UTCGHSA enrichmentGHSA-fmxx-r7q4-v8m6 · GitHub CVSS 4.5
  50. 2026-10-02 14:30 UTCEG score recompute
  51. 2026-10-02 14:30 UTCVendor advisory
  52. 2026-10-02 14:29 UTCGHSA enrichmentGHSA-fmxx-r7q4-v8m6 · GitHub CVSS 4.5
  53. 2026-10-02 09:33 UTCEG score recompute
  54. 2026-10-02 09:33 UTCVendor advisory
  55. 2026-10-02 09:33 UTCGHSA enrichmentGHSA-fmxx-r7q4-v8m6 · GitHub CVSS 4.5
  56. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  57. 2026-10-01 08:39 UTCEG score recompute
  58. 2026-10-01 08:39 UTCVendor advisory
  59. 2026-10-01 08:39 UTCGHSA enrichmentGHSA-fmxx-r7q4-v8m6 · GitHub CVSS 4.5
  60. 2026-09-30 07:46 UTCEG score recompute
  61. 2026-09-30 07:46 UTCVendor advisory
  62. 2026-09-30 07:46 UTCGHSA enrichmentGHSA-fmxx-r7q4-v8m6 · GitHub CVSS 4.5
  63. 2026-09-29 15:24 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  64. 2026-09-29 06:47 UTCEG score recompute
  65. 2026-09-29 06:47 UTCVendor advisory
  66. 2026-09-29 06:47 UTCGHSA enrichmentGHSA-fmxx-r7q4-v8m6 · GitHub CVSS 4.5
  67. 2026-09-28 13:52 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  68. 2026-09-28 05:54 UTCEG score recompute
  69. 2026-09-28 05:54 UTCVendor advisory
  70. 2026-09-28 05:54 UTCGHSA enrichmentGHSA-fmxx-r7q4-v8m6 · GitHub CVSS 4.5
  71. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  72. 2026-09-27 05:01 UTCEG score recompute
  73. 2026-09-27 05:01 UTCVendor advisory
  74. 2026-09-27 05:01 UTCGHSA enrichmentGHSA-fmxx-r7q4-v8m6 · GitHub CVSS 4.5
  75. 2026-09-26 15:59 UTCEPSS rescoreEPSS 0.4% · 29th percentile

Frequently asked(5)

What is CVE-2026-79705?
CVE-2026-79705 is a medium-severity vulnerability; its CVE record was published on September 15, 2026. A flaw was found in the buildah/copier Go package. When used outside of Buildah by a non-root caller, a crafted tar archive containing malicious symlinks can escape the target extraction directory and create files outside the intended destination. Buildah itself uses chroot hardening and is not…
When was CVE-2026-79705 made public?
CVE-2026-79705 was made public on September 15, 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 September 15, 2026. EchelonGraph's copy of the record carries a last-modified date of November 1, 2026; the record at its source may have been updated since.
Is CVE-2026-79705 actively exploited?
CVE-2026-79705 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.4% probability of exploitation in the next 30 days (35th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-79705?
CVE-2026-79705 has a CVSS base score of 4.5 (the CNA's own assessment, by redhat; NVD's own analysis pending).
How do I remediate CVE-2026-79705?
A fix for CVE-2026-79705 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-79705 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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