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 — 4 sources updated 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 17× in last 7d / 137× 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 253 total refreshes for this CVE.

  1. 2026-09-18 19:27 UTCEPSS rescore
  2. 2026-09-18 03:59 UTCEG score recompute
  3. 2026-09-18 03:59 UTCVendor advisory
  4. 2026-09-18 03:59 UTCGHSA enrichment
  5. 2026-09-16 14:07 UTCEPSS rescore
  6. 2026-09-16 12:48 UTCEG score recompute
  7. 2026-09-16 12:48 UTCVendor advisory
  8. 2026-09-16 12:48 UTCGHSA enrichment
  9. 2026-09-16 05:14 UTCEPSS rescore
  10. 2026-09-14 04:51 UTCEG score recompute
  11. 2026-09-14 04:51 UTCVendor advisory
  12. 2026-09-14 04:51 UTCGHSA enrichment
  13. 2026-09-13 16:46 UTCEPSS rescore
  14. 2026-09-13 03:20 UTCEG score recompute
  15. 2026-09-13 03:20 UTCVendor advisory
  16. 2026-09-13 03:20 UTCGHSA enrichment
  17. 2026-09-12 15:00 UTCEPSS rescore
  18. 2026-09-11 20:31 UTCEG score recompute
  19. 2026-09-11 20:31 UTCVendor advisory
  20. 2026-09-11 20:31 UTCGHSA enrichment
  21. 2026-09-11 14:52 UTCEPSS rescore
  22. 2026-09-11 09:36 UTCEPSS rescore
  23. 2026-09-10 18:24 UTCEG score recompute
  24. 2026-09-10 18:24 UTCVendor advisory
  25. 2026-09-10 18:24 UTCGHSA enrichment
Show 75 more
  1. 2026-09-10 17:30 UTCEG score recompute
  2. 2026-09-10 17:30 UTCVendor advisory
  3. 2026-09-10 17:30 UTCGHSA enrichment
  4. 2026-09-10 09:34 UTCEPSS rescore
  5. 2026-09-09 08:21 UTCEG score recompute
  6. 2026-09-09 08:21 UTCVendor advisory
  7. 2026-09-09 08:21 UTCGHSA enrichment
  8. 2026-09-09 07:53 UTCEG score recompute
  9. 2026-09-09 07:53 UTCVendor advisory
  10. 2026-09-09 07:53 UTCGHSA enrichment
  11. 2026-09-09 05:32 UTCEG score recompute
  12. 2026-09-09 05:32 UTCVendor advisory
  13. 2026-09-09 05:32 UTCGHSA enrichment
  14. 2026-09-09 04:42 UTCEG score recompute
  15. 2026-09-09 04:42 UTCVendor advisory
  16. 2026-09-09 04:41 UTCGHSA enrichment
  17. 2026-09-09 03:19 UTCEG score recompute
  18. 2026-09-09 03:19 UTCVendor advisory
  19. 2026-09-09 03:19 UTCGHSA enrichment
  20. 2026-09-09 03:12 UTCEG score recompute
  21. 2026-09-09 03:12 UTCVendor advisory
  22. 2026-09-09 03:12 UTCGHSA enrichment
  23. 2026-09-08 23:20 UTCEG score recompute
  24. 2026-09-08 23:20 UTCVendor advisory
  25. 2026-09-08 23:20 UTCGHSA enrichment
  26. 2026-09-08 22:54 UTCEG score recompute
  27. 2026-09-08 22:54 UTCVendor advisory
  28. 2026-09-08 22:54 UTCGHSA enrichment
  29. 2026-09-08 22:00 UTCEPSS rescore
  30. 2026-09-07 22:58 UTCEG score recompute
  31. 2026-09-07 22:58 UTCVendor advisory
  32. 2026-09-07 22:58 UTCGHSA enrichment
  33. 2026-09-07 16:01 UTCEPSS rescore
  34. 2026-09-06 13:47 UTCEPSS rescore
  35. 2026-09-06 11:48 UTCEG score recompute
  36. 2026-09-06 11:48 UTCVendor advisory
  37. 2026-09-06 11:48 UTCGHSA enrichment
  38. 2026-09-05 09:36 UTCEG score recompute
  39. 2026-09-05 09:36 UTCVendor advisory
  40. 2026-09-05 09:36 UTCGHSA enrichment
  41. 2026-09-04 05:06 UTCEPSS rescore
  42. 2026-09-02 14:11 UTCEPSS rescore
  43. 2026-09-01 13:53 UTCEPSS rescore
  44. 2026-09-01 13:42 UTCEG score recompute
  45. 2026-09-01 13:42 UTCVendor advisory
  46. 2026-09-01 13:42 UTCGHSA enrichment
  47. 2026-09-01 13:00 UTCEG score recompute
  48. 2026-09-01 13:00 UTCVendor advisory
  49. 2026-09-01 13:00 UTCGHSA enrichment
  50. 2026-09-01 04:39 UTCEPSS rescore
  51. 2026-09-01 03:33 UTCEG score recompute
  52. 2026-09-01 03:33 UTCVendor advisory
  53. 2026-09-01 03:32 UTCGHSA enrichment
  54. 2026-09-01 02:41 UTCEG score recompute
  55. 2026-09-01 02:41 UTCVendor advisory
  56. 2026-09-01 02:41 UTCGHSA enrichment
  57. 2026-08-31 21:23 UTCEG score recompute
  58. 2026-08-31 21:23 UTCVendor advisory
  59. 2026-08-31 21:23 UTCGHSA enrichment
  60. 2026-08-31 20:47 UTCEG score recompute
  61. 2026-08-31 20:47 UTCVendor advisory
  62. 2026-08-31 20:47 UTCGHSA enrichment
  63. 2026-08-31 16:40 UTCEG score recompute
  64. 2026-08-31 16:40 UTCVendor advisory
  65. 2026-08-31 16:40 UTCGHSA enrichment
  66. 2026-08-31 15:39 UTCEG score recompute
  67. 2026-08-31 15:39 UTCVendor advisory
  68. 2026-08-31 15:39 UTCGHSA enrichment
  69. 2026-08-31 04:19 UTCEG score recompute
  70. 2026-08-31 04:19 UTCVendor advisory
  71. 2026-08-31 04:19 UTCGHSA enrichment
  72. 2026-08-30 19:17 UTCEPSS rescore
  73. 2026-08-30 02:39 UTCEG score recompute
  74. 2026-08-30 02:39 UTCVendor advisory
  75. 2026-08-30 02:39 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 86.6% 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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