CVE-2026-5704

MEDIUMNVD 5.55.5
EchelonGraph scoreMEDIUM confidence

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

This medium-severity CVE scores 5.5 under NVD CVSS v3. EPSS exploit probability: 0.4% (37th percentile of EPSS-scored CVEs). GitHub Security Advisory CVSS 5.0 is lower than this score; a lower GitHub score revises it only when its advisory is newer than the CVE record's last change, and this advisory (published 2026-04-06) is not newer than that change (2026-10-26), so it does not.

Triggered by: Headline CVSS from NVD CVSS v3
Sources: EPSS, GitHub Security Advisory, NVD CVSS v3
Trending — 4 sources updated this week

Also known asEUVD-2026-19317 (ENISA EUVD) · GHSA-jqqw-37x4-9rwj (GitHub Security Advisories)Source: ENISA EUVD

5.5EG
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: 5.5Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

A flaw was found in tar. A remote attacker could exploit this vulnerability by crafting a malicious archive, leading to hidden file injection with fully attacker-controlled content. This bypasses pre-extraction inspection mechanisms, potentially allowing an attacker to introduce malicious files onto a system without detection.

CVSS v3
5.5
EG Score
5.5MEDIUMmedium confidence
EG Risk
25
EG Risk 25/100

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)
Severity55% × 45%
Impact severity (EG Severity): CVSS 5.5 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
37th
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 (5.5): severity, escalated by confirmed exploitation. This CVE's 5.5 is its impact severity (EG Severity), not escalated.

EG Severity
5.5 MEDIUMCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.NVD CVSS v3 · CVSS v3.0 or v3.1
EG Likelihood
0.4% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-10-26). 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: 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.

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

April 6, 2026

Last Modified

October 26, 2026

Advisory Details (2)

Auto-updated Jul 3, 2026
Patch available. Sources: redhat.
Red Hat

2455360 – (CVE-2026-5704) CVE-2026-5704 tar: tar: Hidden file injection via crafted archives

https://bugzilla.redhat.com/show_bug.cgi?id=2455360
Red HatMentions a patch (unverified)

cve-details

https://access.redhat.com/security/cve/CVE-2026-5704

Patch Availability(9)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
ubuntutar-scripts (1.34+dfsg-1ubuntu0.1.22.04.5) @ jammy2026-10-26ubuntu
ubuntutar-scripts (1.35+dfsg-4ubuntu0.1) @ resolute2026-10-26ubuntu
ubuntutar-scripts (1.35+dfsg-4ubuntu0.4) @ resolute2026-10-26ubuntu
redhattar-2:1.30-13.el8_102026-09-22redhat
redhattar-main-1.35-10.hum12026-09-10redhat
redhatrhui5/rhua-rhel9:17888805812026-09-09redhat
redhattar-2:1.35-13.el10_22026-09-01redhat
redhattar-2:1.34-13.el9_82026-08-31redhat
redhatdiscovery/discovery-server-rhel9:17882057792026-08-31redhat

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

(4 across 4 ecosystems)
Debian:11(1)
PackageVulnerable rangeFix by version rangeDependents
tar1.34+dfsg-1 ... 1.35+dfsg-4 (11 versions)
  • every version on: no fix on record
—
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
tar1.34+dfsg-1.2 ... 1.35+dfsg-6 (12 versions)
  • every version on: no fix on record
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
tar1.35+dfsg-3.1, 1.35+dfsg-4, 1.35+dfsg-5, 1.35+dfsg-5+hurd.1, 1.35+dfsg-6
  • every version on: no fix on record
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
tar1.35+dfsg-3.1, 1.35+dfsg-4, 1.35+dfsg-5, 1.35+dfsg-5+hurd.1, 1.35+dfsg-6
  • every version on: no fix on record
—

Weakness Classification(1)

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

Additional Vendor Advisories

(5)

Vendors that published advisories for this CVE beyond the curated set above. Broader coverage but minimal per-row detail — click through for the original advisory.

Data Freshness Timeline

(refreshed 14× in last 7d / 40× 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 263 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 163 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-27 16:32 UTCEPSS rescoreEPSS 0.4% · 37th percentile
  2. 2026-10-26 22:45 UTCEG score recompute
  3. 2026-10-26 22:45 UTCVendor advisory
  4. 2026-10-26 22:45 UTCGHSA enrichmentGHSA-jqqw-37x4-9rwj · GitHub CVSS 5.0
  5. 2026-10-26 16:31 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  6. 2026-10-25 16:33 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  7. 2026-10-25 14:17 UTCEG score recompute
  8. 2026-10-24 16:33 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  9. 2026-10-23 16:32 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  10. 2026-10-22 21:07 UTCEG score recompute
  11. 2026-10-22 21:07 UTCVendor advisory
  12. 2026-10-22 21:07 UTCGHSA enrichmentGHSA-jqqw-37x4-9rwj · GitHub CVSS 5.0
  13. 2026-10-22 16:34 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  14. 2026-10-21 16:33 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  15. 2026-10-20 16:33 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  16. 2026-10-19 16:32 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  17. 2026-10-18 16:32 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  18. 2026-10-18 03:29 UTCEG score recompute
  19. 2026-10-17 16:35 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  20. 2026-10-16 16:43 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  21. 2026-10-15 16:32 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  22. 2026-10-14 16:33 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  23. 2026-10-13 16:34 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  24. 2026-10-12 16:34 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  25. 2026-10-12 15:54 UTCEG score recompute
Show 75 more
  1. 2026-10-11 19:37 UTCEG score recompute
  2. 2026-10-11 16:53 UTCEG score recompute
  3. 2026-10-11 14:15 UTCEG score recompute
  4. 2026-10-11 13:49 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  5. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  6. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  7. 2026-10-08 17:13 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  8. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  9. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  10. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  11. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  12. 2026-10-03 14:26 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  13. 2026-10-02 17:56 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  14. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  15. 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  16. 2026-09-26 15:59 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  17. 2026-09-24 14:04 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  18. 2026-09-23 17:54 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  19. 2026-09-22 22:35 UTCVendor advisory
  20. 2026-09-22 22:35 UTCGHSA enrichmentGHSA-jqqw-37x4-9rwj · GitHub CVSS 5.0
  21. 2026-09-22 21:33 UTCEG score recompute
  22. 2026-09-22 21:33 UTCVendor advisory
  23. 2026-09-22 21:33 UTCGHSA enrichmentGHSA-jqqw-37x4-9rwj · GitHub CVSS 5.0
  24. 2026-09-20 20:16 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  25. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  26. 2026-09-17 19:31 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  27. 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  28. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  29. 2026-09-15 03:11 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  30. 2026-09-13 16:47 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  31. 2026-09-11 14:53 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  32. 2026-09-10 22:20 UTCVendor advisory
  33. 2026-09-10 22:20 UTCGHSA enrichmentGHSA-jqqw-37x4-9rwj · GitHub CVSS 5.0
  34. 2026-09-10 22:11 UTCVendor advisory
  35. 2026-09-10 22:11 UTCGHSA enrichmentGHSA-jqqw-37x4-9rwj · GitHub CVSS 5.0
  36. 2026-09-10 18:24 UTCVendor advisory
  37. 2026-09-10 18:24 UTCGHSA enrichmentGHSA-jqqw-37x4-9rwj · GitHub CVSS 5.0
  38. 2026-09-10 17:30 UTCEG score recompute
  39. 2026-09-10 17:30 UTCVendor advisory
  40. 2026-09-10 17:30 UTCGHSA enrichmentGHSA-jqqw-37x4-9rwj · GitHub CVSS 5.0
  41. 2026-09-10 09:35 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  42. 2026-09-08 22:01 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  43. 2026-09-07 16:01 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  44. 2026-09-06 13:47 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  45. 2026-09-04 05:07 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  46. 2026-09-02 14:12 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  47. 2026-09-01 16:06 UTCVendor advisory
  48. 2026-09-01 16:06 UTCGHSA enrichmentGHSA-jqqw-37x4-9rwj · GitHub CVSS 5.0
  49. 2026-09-01 14:30 UTCEG score recompute
  50. 2026-09-01 14:30 UTCVendor advisory
  51. 2026-09-01 14:30 UTCGHSA enrichmentGHSA-jqqw-37x4-9rwj · GitHub CVSS 5.0
  52. 2026-09-01 13:54 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  53. 2026-09-01 04:40 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  54. 2026-09-01 03:38 UTCVendor advisory
  55. 2026-09-01 03:38 UTCGHSA enrichmentGHSA-jqqw-37x4-9rwj · GitHub CVSS 5.0
  56. 2026-09-01 02:42 UTCVendor advisory
  57. 2026-09-01 02:42 UTCGHSA enrichmentGHSA-jqqw-37x4-9rwj · GitHub CVSS 5.0
  58. 2026-08-31 21:23 UTCEG score recompute▲ 0.50
  59. 2026-08-31 21:23 UTCVendor advisory
  60. 2026-08-31 21:23 UTCGHSA enrichmentGHSA-jqqw-37x4-9rwj · GitHub CVSS 5.0
  61. 2026-08-31 21:21 UTCNVD updateCVSS v3 → 5.5
  62. 2026-08-31 20:47 UTCEG score recompute
  63. 2026-08-31 20:47 UTCVendor advisory
  64. 2026-08-31 20:47 UTCGHSA enrichmentGHSA-jqqw-37x4-9rwj · GitHub CVSS 5.0
  65. 2026-08-30 19:17 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  66. 2026-08-30 01:22 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  67. 2026-08-28 21:42 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  68. 2026-08-27 14:25 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  69. 2026-08-26 14:46 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  70. 2026-08-25 13:49 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  71. 2026-08-23 00:19 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  72. 2026-08-21 23:49 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  73. 2026-08-20 22:55 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  74. 2026-08-19 17:04 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  75. 2026-08-18 13:48 UTCEPSS rescoreEPSS 0.4% · 30th percentile

Frequently asked(5)

What is CVE-2026-5704?
CVE-2026-5704 is a medium-severity vulnerability; its CVE record was published on April 6, 2026. A flaw was found in tar. A remote attacker could exploit this vulnerability by crafting a malicious archive, leading to hidden file injection with fully attacker-controlled content. This bypasses pre-extraction inspection mechanisms, potentially allowing an attacker to introduce malicious files…
When was CVE-2026-5704 made public?
CVE-2026-5704 was made public on April 6, 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 April 6, 2026. EchelonGraph's copy of the record carries a last-modified date of October 26, 2026; the record at its source may have been updated since.
Is CVE-2026-5704 actively exploited?
CVE-2026-5704 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.4% probability of exploitation in the next 30 days (37th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-5704?
CVE-2026-5704 has a CVSS v3 base score of 5.5 (NVD).
How do I remediate CVE-2026-5704?
A fix for CVE-2026-5704 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-5704 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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