CVE-2026-58012

HIGHNVD 8.28.2—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 8.2 under NVD CVSS v3. EPSS exploit probability: 0.5%, top 59% of all CVEs by exploit prediction. GitHub Security Advisory enrichment pending alignment with NVD CVSS.

Triggered by: NVD CVSS baseline
Sources: epss, ghsa, nvd
Trending — 4 sources updated this week
8.2EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 8.2Exploit: None knownExposed: 0

A fix is available — apply it.

A flaw was found in GLib. A buffer over-read can occur in the g_regex_replace function when used with the G_REGEX_RAW compile flag and case-change replacement escapes because the string_append function processes matched substrings using UTF-8 functions that assume valid UTF-8 input, even when the string is treated as raw bytes. This vulnerability can cause a minor information disclosure of 1-5 bytes and a denial of service when the buffer over-read crosses a page boundary.

CVSS v3
8.2
EG Score
8.2(medium)
EG Risk
52(Track)
EG Risk 52/100SSVC: 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
Severity82% × 45%
Exploitation0% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
41%
KEV
Not listed

Published

June 30, 2026

Last Modified

September 10, 2026

Advisory Details (3)

Auto-updated Jun 30, 2026
🔬 Proof of concept available. Patch available. Sources: redhat.
generic🟡 PoC Available

(#YWH-PGM9867-193) Buffer Over-read on GLib's g_regex_replace() through glib/gregex.c:string_append() via g_utf8_next_char() (#3918) · Issues · GNOME / GLib · GitLab

https://gitlab.gnome.org/GNOME/glib/-/issues/3918
redhat

2492247 – (CVE-2026-58012) CVE-2026-58012 glib: buffer over-read in g_regex_replace() via glib/gregex.c:string_append() and g_utf8_next_char()

https://bugzilla.redhat.com/show_bug.cgi?id=2492247
redhat Patch Available

cve-details

https://access.redhat.com/security/cve/CVE-2026-58012

Vendor Advisories for CVE-2026-58012(12)

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

Patch Availability(18)

Vendor / EcosystemFixed in / PatchReleasedSource
redhatglib2-0:2.68.4-14.el9_4.82026-09-09redhat
redhatrhui5/rhua-rhel9:17888805812026-09-09redhat
redhatglib2-0:2.56.1-13.el7_9.12026-09-09redhat
redhatglib2-0:2.56.4-158.el8_6.72026-09-09redhat
redhatglib2-0:2.68.4-7.el9_2.72026-09-09redhat
redhatglib2-0:2.56.4-165.el8_8.22026-09-09redhat
redhatglib2-0:2.80.4-4.el10_0.172026-09-09redhat
redhatglib2-0:2.68.4-16.el9_6.72026-09-09redhat
redhatglib2-0:2.56.4-10.el8_4.72026-09-09redhat
redhatcert-manager/cert-manager-istio-csr-rhel9:17883485942026-09-03redhat
redhatcert-manager/cert-manager-operator-rhel9:17883485222026-09-03redhat
redhatcert-manager/jetstack-cert-manager-rhel9:17883485712026-09-03redhat
redhatdiscovery/discovery-ui-rhel9:17882061962026-08-31redhat
redhatglib2-0:2.56.4-177.el8_102026-08-31redhat
redhatrhui5/rhua-tp-rhel9:17872412602026-08-24redhat
redhatglib2-0:2.80.4-12.el10_2.212026-08-19redhat
redhatglib2-0:2.68.4-19.el9_8.92026-08-17redhat
redhatmingw-glib2-0:2.70.1-9.el8_102026-08-03redhat

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 ... 2.88.0-1 (37 versions)2.88.1-2—

Weakness Classification(1)

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

Additional Vendor Advisories

(8)

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 17× in last 7d / 103× 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 323 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-58012?
CVE-2026-58012 is a high vulnerability published on June 30, 2026. A flaw was found in GLib. A buffer over-read can occur in the gregexreplace function when used with the GREGEXRAW compile flag and case-change replacement escapes because the string_append function processes matched substrings using UTF-8 functions that assume valid UTF-8 input, even when the…
When was CVE-2026-58012 disclosed?
CVE-2026-58012 was first published in the National Vulnerability Database on June 30, 2026, with the most recent update on September 10, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-58012 actively exploited?
CVE-2026-58012 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 58.8% of all scored CVEs.
What is the CVSS score of CVE-2026-58012?
CVE-2026-58012 has a CVSS v3 base score of 8.2 (NVD).
How do I remediate CVE-2026-58012?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-58012, 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

See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-58012

Explore →

Is Your Infrastructure Affected by CVE-2026-58012?

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

Start Free Scan →Browse All CVEs