CVE-2026-9149

MEDIUMNVD 6.56.5—
EchelonGraph scoreMEDIUM confidence

Score 6.5 from GitHub Security Advisory published 2026-05-21. NVD baseline CVSS 6.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Elevated
6.5
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 0%CVSS: 6.5Exploit: NoneExposed: 0

A fix is available — apply it.

A flaw was found in libsolv. This heap buffer overflow vulnerability occurs when a victim processes a specially crafted .solv file containing negative size values in the repo_add_solv function. This leads to an undersized memory allocation and a subsequent out-of-bounds write. An attacker could exploit this to cause a denial of service (DoS).

CVSS v3
6.5
EG Score
6.5(medium)
EPSS
20.9%
KEV
Not listed

Published

May 21, 2026

Last Modified

June 27, 2026

Advisory Details (3)

Auto-updated Jun 12, 2026
Patch available. Sources: redhat, github_pr.
github_pr

Cope with integer overflow in data size arithmetics in repo_add_solv()

Fix merged in openSUSE/libsolv PR #617 on 2026-04-28 — awaiting tagged release

https://github.com/openSUSE/libsolv/pull/617
redhat

2460380 – (CVE-2026-9149) CVE-2026-9149 libsolv: Heap buffer overflow in libsolv repo_add_solv via negative maxsize from crafted .solv file

https://bugzilla.redhat.com/show_bug.cgi?id=2460380
redhat Patch Available

cve-details

https://access.redhat.com/security/cve/CVE-2026-9149

Vendor Advisories for CVE-2026-9149(4)

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
redhatlibsolv-0:0.7.33-5.el10_22026-06-23redhat
redhatlibsolv-main-0.7.38-2.hum12026-05-27redhat

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.

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 7× in last 7d / 75× 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 105 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-9149?
CVE-2026-9149 is a medium vulnerability published on May 21, 2026. A flaw was found in libsolv. This heap buffer overflow vulnerability occurs when a victim processes a specially crafted .solv file containing negative size values in the repoaddsolv function. This leads to an undersized memory allocation and a subsequent out-of-bounds write. An attacker could…
When was CVE-2026-9149 disclosed?
CVE-2026-9149 was first published in the National Vulnerability Database on May 21, 2026, with the most recent update on June 27, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-9149 actively exploited?
CVE-2026-9149 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 20.9% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-9149?
CVE-2026-9149 has a CVSS v3 base score of 6.5 (NVD).
How do I remediate CVE-2026-9149?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-9149, 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

Explore the affected products and dependency analysis for CVE-2026-9149

Explore →

Is Your Infrastructure Affected by CVE-2026-9149?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Start Free Scan →Browse All CVEs