CVE-2026-5704

MEDIUMNVD 5.55.5—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 5.5 under NVD CVSS v3. EPSS exploit probability: 0.4%, top 69% of all CVEs by exploit prediction. GitHub Security Advisory enrichment pending alignment with NVD CVSS.

Triggered by: NVD CVSS baseline
Sources: epss, ghsa, nvd
Trending — 4 sources updated this week
5.5EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 5.5Exploit: None knownExposed: 0

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
5.5(medium)
EG Risk
25(Track)
EG Risk 25/100SSVC: 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
Severity55% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
34%
KEV
Not listed

Published

April 6, 2026

Last Modified

September 10, 2026

Advisory Details (2)

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

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

https://bugzilla.redhat.com/show_bug.cgi?id=2455360
redhat Patch Available

cve-details

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

Vendor Advisories for CVE-2026-5704(4)

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

Patch Availability(6)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntutar-scripts (1.35+dfsg-3ubuntu0.3) @ noble2026-09-10ubuntu
ubuntutar-scripts (1.35+dfsg-4ubuntu0.1) @ resolute2026-09-10ubuntu
ubuntutar-scripts (1.34+dfsg-1ubuntu0.1.22.04.6) @ jammy2026-09-10ubuntu
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 rangeFixed inDependents
tar1.34+dfsg-1 ... 1.35+dfsg-4 (11 versions)——
Debian:12(1)
PackageVulnerable rangeFixed inDependents
tar1.34+dfsg-1.2 ... 1.35+dfsg-5 (10 versions)——
Debian:13(1)
PackageVulnerable rangeFixed inDependents
tar1.35+dfsg-3.1, 1.35+dfsg-4, 1.35+dfsg-5——
Debian:14(1)
PackageVulnerable rangeFixed inDependents
tar1.35+dfsg-3.1, 1.35+dfsg-4, 1.35+dfsg-5——

Weakness Classification(1)

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

Additional Vendor Advisories

(4)

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 / 58× 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.

Showing the most recent 100 of 208 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-5704?
CVE-2026-5704 is a medium vulnerability 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 disclosed?
CVE-2026-5704 was first published in the National Vulnerability Database on April 6, 2026, with the most recent update on September 10, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-5704 actively exploited?
CVE-2026-5704 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 66.4% of all 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?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-5704, 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

See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-5704

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