CVE-2026-16517

LOWPre-NVD 2.92.9—
EchelonGraph scoreHIGH 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
2.9
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 0%CVSS: 2.9Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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(high)
EPSS
0.0%
KEV
Not listed

Published

July 21, 2026

Last Modified

July 22, 2026

References (3)

Vendor Advisories for CVE-2026-16517(2)

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

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 11× in last 7d / 11× 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.

  1. 2026-07-22 22:14 UTCEG score recompute
  2. 2026-07-22 22:14 UTCGHSA enrichment
  3. 2026-07-22 15:06 UTCEG score recompute
  4. 2026-07-22 15:06 UTCGHSA enrichment
  5. 2026-07-22 14:08 UTCEPSS rescore
  6. 2026-07-22 13:39 UTCEG score recompute
  7. 2026-07-22 13:39 UTCGHSA enrichment
  8. 2026-07-22 01:44 UTCEG score recompute
  9. 2026-07-22 01:44 UTCGHSA enrichment
  10. 2026-07-21 23:10 UTCEG score recompute
  11. 2026-07-21 23:09 UTCMITRE cvelistV5first tracked

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 July 22, 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 0.0% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
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

Explore the affected products and dependency analysis for CVE-2026-16517

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