CVE-2026-16118

HIGHPre-NVD 7.17.1—
EchelonGraph scoreMEDIUM 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 — 4 sources updated this weekElevated
7.1EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.1Exploit: Elevated riskExposed: 0

A fix is available — apply it.

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(medium)
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 PROB
0%
EPSS %ILE
16%
KEV
Not listed

Published

July 17, 2026

Last Modified

September 11, 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(3)

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

Patch Availability(3)

Vendor / EcosystemFixed in / PatchReleasedSource
redhatglib2-0:2.56.4-178.el8_102026-09-11redhat
redhatglib2-0:2.80.4-12.el10_2.222026-09-08redhat
redhatglib2-0:2.68.4-19.el9_8.102026-09-08redhat

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
glib2.02.66.8-1 ... 2.89.3-2 (186 versions)——
Debian:12(1)
PackageVulnerable rangeFixed inDependents
glib2.02.74.6-2 ... 2.89.4-2 (146 versions)——
Debian:13(1)
PackageVulnerable rangeFixed inDependents
glib2.02.84.3-1 ... 2.89.4-2 (49 versions)——
Debian:14(1)
PackageVulnerable rangeFixed inDependents
glib2.02.84.3-1 ... 2.88.3-2 (41 versions)2.88.3-3—

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 11× in last 7d / 82× 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 204 total refreshes for this CVE.

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

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 September 11, 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 0% probability of exploitation in the next 30 days, which ranks it in the top 83.9% of all scored CVEs.
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

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