CVE-2026-55971

CRITICALNVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2026-07-27. NVD baseline CVSS 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Trending — 4 sources updated this week
9.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 9.8Exploit: None knownExposed: 0

A fix is available — apply it.

Heap-based Buffer Overflow vulnerability in Apache Thrift C++ bindings.

This issue affects Apache Thrift: before 0.24.0.

Users are recommended to upgrade to version 0.24.0, which fixes the issue.

CVSS v3
9.8
EG Score
9.8(medium)
EG Risk
59(Track)
EG Risk 59/100SSVC: 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
Severity98% × 45%
Exploitation1% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
44%
KEV
Not listed

Published

July 27, 2026

Last Modified

July 28, 2026

Advisory Details (3)

Auto-updated Sep 15, 2026
No patch confirmed yet.
generic

oss-security - CVE-2026-55971: Apache Thrift: C++ ZLIB heap buffer overflow (write) in THeaderTransport::untransform()

http://www.openwall.com/lists/oss-security/2026/07/24/42
generic
https://lists.apache.org/thread/xjs36m6kjxpmrmzwck636msg3nvoqnmx
generic
https://lists.apache.org/thread/7v3jhgwfbmhx42424phydlnzb109g8b9

Vendor Advisories for CVE-2026-55971(2)

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
redhatthrift-0:0.24.0-2.el9ai2026-08-06redhat
redhatthrift-0:0.24.0-1.el9ai2026-08-03redhat
redhatthrift-main-0.24.0-0.1.hum12026-08-03redhat

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
thrift0.13.0-6 ... 0.23.0-3 (29 versions)——
Debian:12(1)
PackageVulnerable rangeFixed inDependents
thrift0.17.0-2 ... 0.24.0-1 (20 versions)——
Debian:13(1)
PackageVulnerable rangeFixed inDependents
thrift0.19.0-4 ... 0.24.0-1 (10 versions)——
Debian:14(1)
PackageVulnerable rangeFixed inDependents
thrift0.19.0-4 ... 0.24.0-1 (10 versions)——

Weakness Classification(1)

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

Additional Vendor Advisories

(4)

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 58× in last 7d / 258× 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 498 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-55971?
CVE-2026-55971 is a critical vulnerability published on July 27, 2026. Heap-based Buffer Overflow vulnerability in Apache Thrift C++ bindings. This issue affects Apache Thrift: before 0.24.0. Users are recommended to upgrade to version 0.24.0, which fixes the issue.
When was CVE-2026-55971 disclosed?
CVE-2026-55971 was first published in the National Vulnerability Database on July 27, 2026, with the most recent update on July 28, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-55971 actively exploited?
CVE-2026-55971 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 55.6% of all scored CVEs.
What is the CVSS score of CVE-2026-55971?
CVE-2026-55971 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2026-55971?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-55971, 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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