CVE-2026-16526

HIGHPre-NVD 8.88.8—
EchelonGraph scoreHIGH confidence

Score 8.8 from GitHub Security Advisory (severity: HIGH) published 2026-07-30. a secondary CVSS source baseline 8.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 4 sources updated this week
8.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 8.8Exploit: None knownExposed: 0

A fix is available — apply it.

A flaw in the PCP linux_sockets module exposes an unsecured internal connection. An attacker with initial code execution can exploit this to escalate privileges and execute arbitrary commands as root.

CVSS v3
8.8
EG Score
8.8(high)
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
Severity88% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
37%
KEV
Not listed

Published

July 30, 2026

Last Modified

August 21, 2026

Advisory Details (2)

Auto-updated Jul 30, 2026
Patch available. Sources: redhat.
redhat

2506026 – (CVE-2026-16526) CVE-2026-16526 PCP: PCP: Privilege escalation to root via linux_sockets PMDA vulnerability

https://bugzilla.redhat.com/show_bug.cgi?id=2506026
redhat Patch Available

cve-details

https://access.redhat.com/security/cve/CVE-2026-16526

Vendor Advisories for CVE-2026-16526(1)

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
redhatpcp-0:7.0.3-5.el10_22026-08-17redhat
redhatpcp-0:5.3.7-22.el8_10.52026-08-17redhat
redhatpcp-0:6.3.7-8.el9_8.42026-08-17redhat

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
pcp5.2.6-1 ... 7.2.0-1 (44 versions)——
Debian:12(1)
PackageVulnerable rangeFixed inDependents
pcp6.0.3-1.1 ... 7.2.0-1 (30 versions)——
Debian:13(1)
PackageVulnerable rangeFixed inDependents
pcp6.3.8-1 ... 7.2.0-1 (14 versions)——
Debian:14(1)
PackageVulnerable rangeFixed inDependents
pcp6.3.8-1 ... 7.2.0-1 (14 versions)——

Weakness Classification(1)

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

All Vendor Advisories

(3)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Data Freshness Timeline

(refreshed 43× in last 7d / 131× 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 131 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-16526?
CVE-2026-16526 is a high vulnerability published on July 30, 2026. A flaw in the PCP linux_sockets module exposes an unsecured internal connection. An attacker with initial code execution can exploit this to escalate privileges and execute arbitrary commands as root.
When was CVE-2026-16526 disclosed?
CVE-2026-16526 was first published in the National Vulnerability Database on July 30, 2026, with the most recent update on August 21, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-16526 actively exploited?
CVE-2026-16526 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 62.5% of all scored CVEs.
What is the CVSS score of CVE-2026-16526?
CVE-2026-16526 has a CVSS v3 base score of 8.8 (NVD).
How do I remediate CVE-2026-16526?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-16526, 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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