CVE-2026-16118

HIGHPre-NVD 7.17.1—
EchelonGraph scoreHIGH confidence

Score 7.1 from GitHub Security Advisory (severity: HIGH) published 2026-07-17. a secondary CVSS source baseline 7.1; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this weekElevated
7.1
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 7.1Exploit: NoneExposed: 0

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

A flaw was found in xdgmime. A heap-based buffer overflow can be triggered in _xdg_mime_magic_parse_magic_line() in the xdgmimemagic.c file on little-endian systems when an attacker-controlled MIME magic file in a user-writable XDG data location (e.g., in the $XDG_DATA_HOME/mime/magic path) is parsed by an application performing MIME type detection (e.g., via g_content_type_guess()). When performing byte-swap, incorrect pointer arithmetic on the write side causes an out-of-bounds write of 2 bytes, resulting in an application crash or memory corruption.

CVSS v3
7.1
EG Score
7.1(high)
EG Risk
48(Track)
EG Risk 48/100SSVC: 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
Severity71% × 45%
Exploitation40% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS
3.3%
KEV
Not listed

Published

July 17, 2026

Last Modified

July 22, 2026

Advisory Details (3)

Auto-updated Jul 17, 2026
🔬 Proof of concept available. Patch available. Sources: redhat.
generic🟡 PoC Available

(#YWH-PGM9867-233) Heap Overflow on GLib through _xdg_mime_magic_parse_magic_line() in gio/xdgmime/xdgmimemagic.c via Incorrect Byte-Swap Pointer Arithmetic on MIME magic content in user-writable XDG data location (#41) · Issues · xdg / xdgmime · GitLab

https://gitlab.freedesktop.org/xdg/xdgmime/-/work_items/41
redhat

2501732 – (CVE-2026-16118) CVE-2026-16118 xdgmime: heap-based buffer overflow in _xdg_mime_magic_parse_magic_line() in xdgmimemagic.c

https://bugzilla.redhat.com/show_bug.cgi?id=2501732
redhat Patch Available

cve-details

https://access.redhat.com/security/cve/CVE-2026-16118

Vendor Advisories for CVE-2026-16118(1)

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 10× in last 7d / 14× 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. 2026-07-24 14:17 UTCEPSS rescore
  2. 2026-07-23 14:18 UTCEPSS rescore
  3. 2026-07-23 03:05 UTCEG score recompute
  4. 2026-07-23 00:12 UTCEG score recompute
  5. 2026-07-23 00:12 UTCGHSA enrichment
  6. 2026-07-22 14:08 UTCEPSS rescore
  7. 2026-07-21 15:24 UTCEPSS rescore
  8. 2026-07-20 17:08 UTCEPSS rescore
  9. 2026-07-19 14:30 UTCEPSS rescore
  10. 2026-07-19 02:28 UTCEPSS rescore
  11. 2026-07-17 22:02 UTCEG score recompute
  12. 2026-07-17 22:02 UTCGHSA enrichment
  13. 2026-07-17 19:50 UTCEG score recompute
  14. 2026-07-17 19:49 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-16118?
CVE-2026-16118 is a high vulnerability published on July 17, 2026. A flaw was found in xdgmime. A heap-based buffer overflow can be triggered in xdgmimemagicparsemagicline() in the xdgmimemagic.c file on little-endian systems when an attacker-controlled MIME magic file in a user-writable XDG data location (e.g., in the $XDGDATAHOME/mime/magic path) is parsed by an…
When was CVE-2026-16118 disclosed?
CVE-2026-16118 was first published in the National Vulnerability Database on July 17, 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-2026-16118 actively exploited?
CVE-2026-16118 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 3.3% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-16118?
CVE-2026-16118 has a CVSS v3 base score of 7.1 (NVD).
How do I remediate CVE-2026-16118?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-16118, 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-2026-16118

Explore →

Is Your Infrastructure Affected by CVE-2026-16118?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Start Free Scan →Browse All CVEs