CVE-2026-70634

HIGHPre-NVD 8.18.1—
EchelonGraph scoreMEDIUM confidence

Score 8.1 from GitHub Security Advisory (severity: HIGH) published 2026-08-07. A secondary CVSS source baseline 8.1; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
8.1EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.5%CVSS: 8.1Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

TimescaleDB through 2.29.1, fixed in commit 517c13e, contains an out-of-bounds read in the Dictionary compression reverse row iterator (tsl/src/compression/algorithms/dictionary.c). The forward path validates the decoded index; the reverse path uses an assertion compiled out of release builds, leaving the 64-bit Simple8b index unvalidated and the read offset attacker-controlled. Attackers with DML access to a physical compressed relation can store a crafted datum and run a reverse-order scan. With a pass-by-value column type the out-of-bounds Datum is returned to the client as a normal column value, disclosing backend memory including the shared buffer pool, which SQL access control does not cover.

CVSS v3
8.1
EG Score
8.1HIGHmedium confidence
EG Risk
37
EG Risk 37/100CISA 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
Severity81% × 45%
Exploitation1% × 40%
Automatability0% × 15%
CISA SSVC: Track at every mission impact level.
Action: A fix is available. Apply it within your standard update timelines.
EPSS PROB
0.5%
EPSS %ILE
43rd
KEV
Not listed

CISA SSVCTrack at every mission impact level.

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

Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (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

August 6, 2026

Last Modified

September 1, 2026

Advisory Details (2)

Auto-updated Aug 6, 2026
Patch available. Sources: github_pr, github_commit.
github_commit

commit 517c13e7cc6a (timescale/timescaledb)

Fix landed in timescale/timescaledb commit 517c13e7cc6a — awaiting tagged release

https://github.com/timescale/timescaledb/commit/517c13e7cc6afadb4a7deaa7a5a5a29065e5b5a3
github_pr

Fix crashes with malformed compressed data

Fix merged in timescale/timescaledb PR #10360 on 2026-08-03 — awaiting tagged release

https://github.com/timescale/timescaledb/pull/10360

Vendor Advisories for CVE-2026-70634(1)

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

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 18× in last 7d / 90× 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 205 total refreshes for this CVE.

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

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-70634?
CVE-2026-70634 is a high vulnerability published on August 6, 2026. TimescaleDB through 2.29.1, fixed in commit 517c13e, contains an out-of-bounds read in the Dictionary compression reverse row iterator (tsl/src/compression/algorithms/dictionary.c). The forward path validates the decoded index; the reverse path uses an assertion compiled out of release builds,…
When was CVE-2026-70634 disclosed?
CVE-2026-70634 was first published on August 6, 2026, with the most recent update on September 1, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-70634 actively exploited?
CVE-2026-70634 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.5% probability of exploitation in the next 30 days (43rd percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-70634?
CVE-2026-70634 has a CVSS base score of 8.1 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-70634?
A fix for CVE-2026-70634 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-70634 are linked in the Vendor Advisories panel on this page.

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