CVE-2026-15588

MEDIUMPre-NVD 5.35.3—
EchelonGraph scoreMEDIUM confidence

Score 5.3 from GitHub Security Advisory published 2026-07-20. a secondary CVSS source baseline 5.3; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — Patch released this weekElevated
5.3EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 5.3Exploit: Elevated riskExposed: 0

A fix is available — apply it.

A denial-of-service and resource exhaustion vulnerability exists within the GDBus component of GLib. The gdbusauth authentication mechanism fails to enforce proper length limitations on data lines read from a client. An unauthenticated local or remote attacker can exploit this lack of input validation by sending excessively long streams of data, causing the application to consume massive amounts of system memory and CPU, potentially leading to a crash or system hang.

CVSS v3
5.3
EG Score
5.3(medium)
EG Risk
40(Track)
EG Risk 40/100SSVC: 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
Severity53% × 45%
Exploitation40% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
13%
KEV
Not listed

Published

July 20, 2026

Last Modified

September 10, 2026

Advisory Details (3)

Auto-updated Jul 20, 2026
Patch available. Sources: redhat.
generic

Security report: GDBusServer pre-authentication DoS via unbounded SASL line buffering (#3985) · Issues · GNOME / GLib · GitLab

https://gitlab.gnome.org/GNOME/glib/-/issues/3985
redhat

2499675 – (CVE-2026-15588) CVE-2026-15588 GDBusServer: glib2: GDBusServer pre-authentication DoS via unbounded SASL line buffering

https://bugzilla.redhat.com/show_bug.cgi?id=2499675
redhat Patch Available

cve-details

https://access.redhat.com/security/cve/CVE-2026-15588

Vendor Advisories for CVE-2026-15588(14)

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

Patch Availability(20)

Vendor / EcosystemFixed in / PatchReleasedSource
redhatglib2-0:2.68.4-14.el9_4.82026-09-09redhat
redhatrhui5/rhua-rhel9:17888805812026-09-09redhat
redhatglib2-0:2.68.4-16.el9_6.72026-09-09redhat
redhatglib2-0:2.56.4-158.el8_6.72026-09-09redhat
redhatglib2-0:2.56.4-10.el8_4.72026-09-09redhat
redhatglib2-0:2.56.4-165.el8_8.22026-09-09redhat
redhatglib2-0:2.56.1-13.el7_9.12026-09-09redhat
redhatglib2-0:2.80.4-4.el10_0.172026-09-09redhat
redhatglib2-0:2.68.4-7.el9_2.72026-09-09redhat
redhatcert-manager/cert-manager-operator-rhel9:17883485222026-09-03redhat
redhatcert-manager/jetstack-cert-manager-rhel9:17883485712026-09-03redhat
redhatcert-manager/cert-manager-istio-csr-rhel9:17883485942026-09-03redhat
redhatglib2-0:2.56.4-177.el8_102026-08-31redhat
redhatdiscovery/discovery-ui-rhel9:17882061962026-08-31redhat
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
redhatglib2-main-2.89.2-2.hum12026-07-20redhat
redhatglib2-main-2.89.1-1.1.hum12026-07-15redhat
redhatglib2-main-2.89.1-1.2.hum12026-07-15redhat

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 ... 2.88.2-1 (39 versions)2.88.3-1—

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 48× in last 7d / 155× 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 236 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-15588?
CVE-2026-15588 is a medium vulnerability published on July 20, 2026. A denial-of-service and resource exhaustion vulnerability exists within the GDBus component of GLib. The gdbusauth authentication mechanism fails to enforce proper length limitations on data lines read from a client. An unauthenticated local or remote attacker can exploit this lack of input…
When was CVE-2026-15588 disclosed?
CVE-2026-15588 was first published in the National Vulnerability Database on July 20, 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-2026-15588 actively exploited?
CVE-2026-15588 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 86.9% of all scored CVEs.
What is the CVSS score of CVE-2026-15588?
CVE-2026-15588 has a CVSS v3 base score of 5.3 (NVD).
How do I remediate CVE-2026-15588?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-15588, 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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