High

TimescaleDB 2.29.1 Out-of-Bounds Read DoS via Gorilla Compression Reverse Iterator

Type: advisorySources: OSV

TimescaleDB through 2.29.1, fixed in commit 517c13e, contains an out-of-bounds read vulnerability in the Gorilla compression reverse row iterator that allows authenticated attackers to cause a denial of service by storing a crafted compressed datum with an internally inconsistent BitArray. Attackers with DML access to a compressed hypertable can trigger an unsigned integer wraparound in the reverse iterator bucket index computation, causing a read beyond the end of the bucket array, resulting in a SIGSEGV crash that can be repeatedly triggered on each subsequent reverse-order scan.

Products: Not specified
Affected versions: Not specified
Fixed versions: Not specified
CVEs: CVE-2026-70633
Confirmed fixed CVEs: Not specified
Updated in this feed: 5 Nov 2026, 01:41 UTC · Revision 1

Source evidence

TimescaleDB 2.29.1 Out-of-Bounds Read DoS via Gorilla Compression Reverse Iterator

core-osv · Original source

Published 6 Aug 2026, 16:51 UTC

osv:CVE-2026-70633

Complete source record

{
  "id": "5b8bdd9cb6ba746e55fdbf5a7f9cc5e1ef3d64f3ef3514f816d78cb1fa7b42c8",
  "url": "https://osv.dev/vulnerability/CVE-2026-70633",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "TimescaleDB 2.29.1 Out-of-Bounds Read DoS via Gorilla Compression Reverse Iterator",
    "summary": "TimescaleDB through 2.29.1, fixed in commit 517c13e, contains an out-of-bounds read vulnerability in the Gorilla compression reverse row iterator that allows authenticated attackers to cause a denial of service by storing a crafted compressed datum with an internally inconsistent BitArray. Attackers with DML access to a compressed hypertable can trigger an unsigned integer wraparound in the reverse iterator bucket index computation, causing a read beyond the end of the bucket array, resulting in a SIGSEGV crash that can be repeatedly triggered on each subsequent reverse-order scan.",
    "evidence": "osv:CVE-2026-70633",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2026-70633",
      "aliases": [
        "CVE-2026-70633"
      ],
      "metrics": [
        {
          "type": "CVSS_V4",
          "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/timescale/timescaledb",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "517c13e7cc6afadb4a7deaa7a5a5a29065e5b5a3"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:timescale:timescaledb:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "last_affected": "2.29.1"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "range": [
                      {
                        "fixed": "517c13e7cc6afadb4a7deaa7a5a5a29065e5b5a3"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  }
                ]
              }
            }
          ],
          "versions": [
            "2.13.0-dev",
            "2.13.0-dev1",
            "2.0.0-beta6",
            "2.0.0-beta5",
            "2.0.0-beta2",
            "2.0.0-beta3",
            "2.0.0-beta4",
            "1.1.0",
            "1.0.0",
            "1.0.0-rc3",
            "1.0.0-rc2",
            "1.0.0-rc1",
            "0.12.0",
            "0.11.0",
            "0.10.1",
            "0.10.0",
            "0.9.2",
            "0.9.1",
            "0.9.0",
            "0.8.0",
            "0.7.0",
            "0.6.0",
            "0.5.0",
            "0.4.1",
            "0.4.0",
            "0.3.0",
            "0.2.0",
            "0.1.0",
            "0.0.12-beta",
            "0.0.11-beta",
            "0.0.10-beta",
            "0.0.9-beta",
            "0.0.8-beta",
            "0.0.7-beta",
            "0.0.6-beta",
            "0.0.5-beta",
            "0.0.4-beta",
            "0.0.3-beta",
            "0.0.2-beta",
            "0.0.1-beta"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-70633.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:41.346486906Z",
      "provider": "osv",
      "references": [
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/70xxx/CVE-2026-70633.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-70633",
        "https://www.vulncheck.com/advisories/timescaledb-out-of-bounds-read-dos-via-gorilla-compression-reverse-iterator",
        "https://github.com/timescale/timescaledb/pull/10360",
        "https://github.com/timescale/timescaledb/commit/517c13e7cc6afadb4a7deaa7a5a5a29065e5b5a3",
        "https://github.com/timescale/timescaledb"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-125",
          "CWE-191"
        ],
        "cna_assigner": "VulnCheck",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/70xxx/CVE-2026-70633.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-70633",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 509163,
  "published_at": "2026-08-06T16:51:26.219+00:00"
}