CVE-2026-5745

MEDIUMNVD 5.55.5—
EchelonGraph scoreMEDIUM confidence

Score 5.5 from GitHub Security Advisory published 2026-04-07. NVD baseline CVSS 5.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
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 libarchive. A NULL pointer dereference vulnerability exists in the ACL parsing logic, specifically within the archive_acl_from_text_nl() function. When processing a malformed ACL string (such as a bare "d" or "default" tag without subsequent fields), the function fails to perform adequate validation before advancing the pointer. An attacker can exploit this by providing a maliciously crafted archive, causing an application utilizing the libarchive API (such as bsdtar) to crash, resulting in a Denial of Service (DoS).

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
6%
KEV
Not listed

Published

April 7, 2026

Last Modified

September 1, 2026

Advisory Details (3)

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

2455921 – (CVE-2026-5745) CVE-2026-5745 libarchive: A NULL pointer dereference vulnerability exists in the ACL parser of libarchive

https://bugzilla.redhat.com/show_bug.cgi?id=2455921
redhat Patch Available

cve-details

https://access.redhat.com/security/cve/CVE-2026-5745
redhat Patch Available
https://access.redhat.com/errata/RHSA-2026:8944

Vendor Advisories for CVE-2026-5745(1)

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

Patch Availability(2)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntulibarchive13 (3.4.0-2ubuntu1.5+esm3) @ focal2026-09-01ubuntu
redhatlibarchive-main-3.8.7-1.hum12026-04-20redhat

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
libarchive3.4.3-2 ... 3.8.9-1 (25 versions)——
Debian:12(1)
PackageVulnerable rangeFixed inDependents
libarchive3.6.2-1 ... 3.8.9-1 (22 versions)——
Debian:13(1)
PackageVulnerable rangeFixed inDependents
libarchive3.7.4-4 ... 3.8.9-1 (9 versions)——
Debian:14(1)
PackageVulnerable rangeFixed inDependents
libarchive3.7.4-4, 3.8.4-1, 3.8.5-1, 3.8.6-1, 3.8.7-13.8.8-1—

Weakness Classification(1)

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

Additional Vendor Advisories

(1)

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 16× in last 7d / 60× 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 179 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-5745?
CVE-2026-5745 is a medium vulnerability published on April 7, 2026. A flaw was found in libarchive. A NULL pointer dereference vulnerability exists in the ACL parsing logic, specifically within the archiveaclfromtextnl() function. When processing a malformed ACL string (such as a bare "d" or "default" tag without subsequent fields), the function fails to perform…
When was CVE-2026-5745 disclosed?
CVE-2026-5745 was first published in the National Vulnerability Database on April 7, 2026, with the most recent update on September 1, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-5745 actively exploited?
CVE-2026-5745 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 94.3% of all scored CVEs.
What is the CVSS score of CVE-2026-5745?
CVE-2026-5745 has a CVSS v3 base score of 5.5 (NVD).
How do I remediate CVE-2026-5745?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-5745, 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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