CVE-2026-16517

LOWPre-NVD 2.92.9—
EchelonGraph scoreMEDIUM confidence

Score 2.9 from GitHub Security Advisory (severity: LOW) published 2026-07-22. a secondary CVSS source baseline 2.9; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 4 sources updated this week
2.9EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 2.9Exploit: None knownExposed: 0

A fix is available — apply it.

A signed integer overflow vulnerability was found in libarchive's ZIP writer. In the archive_write_zip_header function in archive_write_set_format_zip.c, when ZIP encryption is enabled and the entry file size is close to INT64_MAX, the addition of the encryption overhead to the entry size overflows int64_t, resulting in undefined behavior. This could lead to incorrect Zip64 extension decisions or potential memory corruption.

CVSS v3
2.9
EG Score
2.9(medium)
EG Risk
13(Track)
EG Risk 13/100SSVC: 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
Severity29% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
0%
KEV
Not listed

Published

July 21, 2026

Last Modified

September 9, 2026

References (3)

Vendor Advisories for CVE-2026-16517(3)

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

Patch Availability(1)

Vendor / EcosystemFixed in / PatchReleasedSource
redhatlibarchive-main-3.8.8-3.1.hum12026-07-22redhat

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, 3.6.2-1+deb12u1, 3.6.2-1+deb12u2, 3.6.2-1+deb12u3, 3.6.2-1+deb12u43.6.2-1+deb12u5—
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 ... 3.8.8-2 (7 versions)3.8.9-1—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 12× in last 7d / 61× 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 112 total refreshes for this CVE.

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

Related CVEs(same vendor + same CWE)

Frequently asked(5)

What is CVE-2026-16517?
CVE-2026-16517 is a low vulnerability published on July 21, 2026. A signed integer overflow vulnerability was found in libarchive's ZIP writer. In the archivewritezipheader function in archivewritesetformatzip.c, when ZIP encryption is enabled and the entry file size is close to INT64MAX, the addition of the encryption overhead to the entry size overflows…
When was CVE-2026-16517 disclosed?
CVE-2026-16517 was first published in the National Vulnerability Database on July 21, 2026, with the most recent update on September 9, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-16517 actively exploited?
CVE-2026-16517 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 99.9% of all scored CVEs.
What is the CVSS score of CVE-2026-16517?
CVE-2026-16517 has a CVSS v3 base score of 2.9 (NVD).
How do I remediate CVE-2026-16517?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-16517, 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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