CVE-2026-16526

HIGHPre-NVD 8.88.8—
EchelonGraph scoreMEDIUM 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: 0.6%CVSS: 8.8Exploit: None knownExposed services: Not assessed

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
8.8HIGHmedium confidence
EG Risk
40
EG Risk 40/100CISA SSVC

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%
Exploitation1% × 40%
Automatability0% × 15%
CISA SSVC: Track at low or medium mission impact; Track* at high (mission-essential systems).
Action: A fix is available. Apply it within your standard update timelines.
EPSS PROB
0.6%
EPSS %ILE
45th
KEV
Not listed

CISA SSVCTrack at low or medium mission impact; Track* at high (mission-essential systems).

A fix is available. Apply it within your standard update timelines.

Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

July 30, 2026

Last Modified

October 2, 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
redhatMentions a patch (unverified)

cve-details

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

Vendor Advisories for CVE-2026-16526(11)

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

Patch Availability(10)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
redhatpcp-0:5.3.5-10.el8_6.12026-10-01redhat
redhatpcp-0:5.2.5-8.el8_4.12026-10-01redhat
redhatpcp-0:5.3.7-19.el8_8.12026-09-30redhat
redhatpcp-0:6.2.0-5.el9_4.22026-09-28redhat
redhatpcp-0:6.3.7-1.el9_6.12026-09-28redhat
redhatpcp-0:6.3.7-1.el10_0.12026-09-28redhat
redhatpcp-0:6.0.1-8.el9_2.22026-09-28redhat
redhatpcp-0:5.3.7-22.el8_10.52026-08-17redhat
redhatpcp-0:6.3.7-8.el9_8.42026-08-17redhat
redhatpcp-0:7.0.3-5.el10_22026-08-17redhat

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 rangeFix by version rangeDependents
pcp5.2.6-1 ... 7.2.0-1 (44 versions)
  • every version on: no fix on record
—
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
pcp6.0.3-1.1 ... 7.2.1-2 (31 versions)
  • every version on: no fix on record
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
pcp6.3.8-1 ... 7.2.1-2 (15 versions)
  • every version on: no fix on record
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
pcp6.3.8-1 ... 7.2.0-1 (14 versions)
  • every version on: no fix on record
—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 19× in last 7d / 121× 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 311 total refreshes for this CVE.

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

Related CVEs(same product + same vendor + same CWE)

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 on July 30, 2026, with the most recent update on October 2, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-16526 actively exploited?
CVE-2026-16526 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.6% probability of exploitation in the next 30 days (45th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-16526?
CVE-2026-16526 has a CVSS base score of 8.8 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-16526?
A fix for CVE-2026-16526 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-16526 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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