CVE-2026-34990

HIGHNVD 7.87.8—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 7.8 under NVD CVSS v3. EPSS exploit probability: 0.3%, top 79% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, nvd
Elevated
7.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.8Exploit: Elevated riskExposed: 0

A fix is available — apply it.

OpenPrinting CUPS is an open source printing system for Linux and other Unix-like operating systems. In versions 2.4.16 and prior, a local unprivileged user can coerce cupsd into authenticating to an attacker-controlled localhost IPP service with a reusable Authorization: Local ... token. That token is enough to drive /admin/ requests on localhost, and the attacker can combine CUPS-Create-Local-Printer with printer-is-shared=true to persist a file:///... queue even though the normal FileDevice policy rejects such URIs. Printing to that queue gives an arbitrary root file overwrite; the PoC below uses that primitive to drop a sudoers fragment and demonstrate root command execution. At time of publication, there are no publicly available patches.

CVSS v3
7.8
EG Score
7.8(medium)
EG Risk
51(Track*)
EG Risk 51/100SSVC: 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
Severity78% × 45%
Exploitation40% × 40%
Automatability0% × 15%
Action: Watch closely — could escalate to Attend.
EPSS PROB
0%
EPSS %ILE
21%
KEV
Not listed

Published

April 3, 2026

Last Modified

July 24, 2026

Advisory Details (1)

Auto-updated Jun 11, 2026
🔬 Proof of concept available. Patch available. Sources: github.
github Patch Available🟡 PoC Available

Local print admin token disclosure using temporary printers · Advisory · OpenPrinting/cups · GitHub

https://github.com/OpenPrinting/cups/security/advisories/GHSA-c54j-2vqw-wpwp

Vendor Advisories for CVE-2026-34990(2)

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

Patch Availability(2)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntulibcupsimage2-dev (2.4.1op1-1ubuntu4.20) @ jammy2026-07-26ubuntu
redhatcups-main-2.4.17-1.hum12026-04-17redhat

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

(9 across 9 ecosystems)
Alpine:v3.20(1)
PackageVulnerable rangeFixed inDependents
cups—2.4.18-r0—
Alpine:v3.21(1)
PackageVulnerable rangeFixed inDependents
cups—2.4.18-r0—
Alpine:v3.22(1)
PackageVulnerable rangeFixed inDependents
cups—2.4.18-r0—
Alpine:v3.23(1)
PackageVulnerable rangeFixed inDependents
cups—2.4.18-r0—
Alpine:v3.24(1)
PackageVulnerable rangeFixed inDependents
cups—2.4.18-r0—
Debian:11(1)
PackageVulnerable rangeFixed inDependents
cups2.3.3op2-3+deb11u1 ... 2.4.7-3 (36 versions)——
Debian:12(1)
PackageVulnerable rangeFixed inDependents
cups2.4.10-1 ... 2.4.7-3 (27 versions)——
Debian:13(1)
PackageVulnerable rangeFixed inDependents
cups2.4.10-3 ... 2.4.18-1 (9 versions)——
Debian:14(1)
PackageVulnerable rangeFixed inDependents
cups2.4.10-3, 2.4.10-4, 2.4.14-1, 2.4.15-1, 2.4.16-12.4.17-1—

Weakness Classification(1)

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

Additional Vendor Advisories

(1)

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 7× in last 7d / 48× 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 168 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-34990?
CVE-2026-34990 is a high vulnerability published on April 3, 2026. OpenPrinting CUPS is an open source printing system for Linux and other Unix-like operating systems. In versions 2.4.16 and prior, a local unprivileged user can coerce cupsd into authenticating to an attacker-controlled localhost IPP service with a reusable Authorization: Local ... token. That…
When was CVE-2026-34990 disclosed?
CVE-2026-34990 was first published in the National Vulnerability Database on April 3, 2026, with the most recent update on July 24, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-34990 actively exploited?
CVE-2026-34990 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 78.9% of all scored CVEs.
What is the CVSS score of CVE-2026-34990?
CVE-2026-34990 has a CVSS v3 base score of 7.8 (NVD).
How do I remediate CVE-2026-34990?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-34990, 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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