CVE-2026-58015

HIGHNVD 7.55.9▼
EchelonGraph scoreMEDIUM confidence

Score 5.9 from GitHub Security Advisory published 2026-06-30. NVD baseline CVSS 7.5; sources differ by 1.6.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Trending — 4 sources updated this week
7.5
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 7.5Exploit: 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 GLib. The D-Bus client-side implementation of the DBUS_COOKIE_SHA1 SASL authentication mechanism does not validate the cookie_context parameter received from the server. A malicious D-Bus server can supply a cookie_context containing path traversal sequences, causing the client to read an arbitrary file and exfiltrate sensitive data by verifying guessed file contents against a generated hash.

CVSS v3
7.5
EG Score
5.9(medium)
EPSS
33.7%
KEV
Not listed

Published

June 30, 2026

Last Modified

July 2, 2026

Advisory Details (3)

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

(#YWH-PGM9867-203) Path Traversal on GLib DBus through glib/gio/gdbusauthmechanismsha1.c via keyring_lookup_entry, mechanism_client_data_receive (COOKIE_SHA1 Client Authentication) leads to Arbitrary File Read (sort of) (#3931) · Issues · GNOME / GLib · GitLab

https://gitlab.gnome.org/GNOME/glib/-/issues/3931
redhat

2492256 – (CVE-2026-58015) CVE-2026-58015 glib: path traversal in glib/gio/gdbusauthmechanismsha1.c via keyring_lookup_entry and mechanism_client_data_receive

https://bugzilla.redhat.com/show_bug.cgi?id=2492256
redhat Patch Available

cve-details

https://access.redhat.com/security/cve/CVE-2026-58015

Vendor Advisories for CVE-2026-58015(2)

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 24× in last 7d / 24× 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. 2026-07-06 22:19 UTCEG score recompute
  2. 2026-07-06 22:19 UTCGHSA enrichment
  3. 2026-07-06 16:27 UTCEPSS rescore
  4. 2026-07-06 16:27 UTCEPSS rescore
  5. 2026-07-06 02:23 UTCEPSS rescore
  6. 2026-07-06 02:23 UTCEPSS rescore
  7. 2026-07-05 21:02 UTCEG score recompute
  8. 2026-07-05 21:02 UTCGHSA enrichment
  9. 2026-07-05 02:31 UTCEPSS rescore
  10. 2026-07-05 02:30 UTCEPSS rescore
  11. 2026-07-04 19:45 UTCEG score recompute
  12. 2026-07-04 19:45 UTCGHSA enrichment
  13. 2026-07-04 06:31 UTCEPSS rescore
  14. 2026-07-04 06:31 UTCEPSS rescore
  15. 2026-07-03 18:28 UTCEG score recompute
  16. 2026-07-03 18:28 UTCGHSA enrichment
  17. 2026-07-02 17:11 UTCEG score recompute
  18. 2026-07-02 17:11 UTCGHSA enrichment
  19. 2026-07-01 19:07 UTCNVD updateCVSS v3 → 7.5 · severity → HIGH
  20. 2026-07-01 15:50 UTCEG score recompute
  21. 2026-07-01 15:50 UTCGHSA enrichment
  22. 2026-07-01 15:07 UTCEPSS rescore
  23. 2026-06-30 14:33 UTCEG score recompute
  24. 2026-06-30 14:32 UTCNVD updatefirst tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-58015?
CVE-2026-58015 is a high vulnerability published on June 30, 2026. A flaw was found in GLib. The D-Bus client-side implementation of the DBUSCOOKIESHA1 SASL authentication mechanism does not validate the cookiecontext parameter received from the server. A malicious D-Bus server can supply a cookiecontext containing path traversal sequences, causing the client to…
When was CVE-2026-58015 disclosed?
CVE-2026-58015 was first published in the National Vulnerability Database on June 30, 2026, with the most recent update on July 2, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-58015 actively exploited?
CVE-2026-58015 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 33.7% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-58015?
CVE-2026-58015 has a CVSS v3 base score of 7.5 (NVD). EchelonGraph synthesises NVD + CISA KEV + FIRST EPSS + GHSA into a combined EG score of 5.9.
How do I remediate CVE-2026-58015?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-58015, 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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