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
45%
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 42× in last 7d / 226× 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 532 total refreshes for this CVE.

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

Related CVEs(same vendor + same CWE)

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 55.1% 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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