CVE-2026-2007: PostgreSQL pg_trgm heap buffer overflow writes pattern onto server memory
Vulnerability summary
CVE-2026-2007 is a high (CVSS 8.2) Heap-based Buffer Overflow vulnerability in postgresql. EPSS estimates a 0.55% chance of exploitation in the next 30 days, higher than 45.8% of scored vulnerabilities.
Severe, CVSS 8.2 (CVE.org); no exploitation reported by the 5 checked sources; EPSS 1% (FIRST, 03-11-2026)
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 9 · Related 6Timeline
- 12-02-2026PublishedVulnerability first disclosed.
- 15-07-2026Last modifiedVulnerability information updated.
Description
Heap buffer overflow in PostgreSQL pg_trgm allows a database user to achieve unknown impacts via a crafted input string. The attacker has limited control over the byte patterns to be written, but we have not ruled out the viability of attacks that lead to privilege escalation. PostgreSQL 18.1 and 18.0 are affected.
CVSS metrics
5 scores · 5 sources · 1 version- OSV · AlpineEcosystem advisory · calculated8.2HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H
- OSV · UbuntuEcosystem advisory · calculated8.2HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H
- OSV · DebianEcosystem advisory · calculated8.2HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H
- NVDNIST8.2HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H
EPSS trend
Probability
0.55%
Chance of exploitation in the next 30 days
Percentile
46%
Versus all other CVEs
30-day change
Increase +0.04 pp
From 0.51% on 04-10-2026
Known exploited
Compare KEV catalogs
CISA KEVNot in the CISA KEV catalog.
ENISA CNWNot in the ENISA CNW catalog.
CIRCLNot in the CIRCL catalog.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root cause- CWE-122Heap-based Buffer OverflowThe product writes past the end of a buffer that was allocated on the heap.
- CWE-120Buffer Copy without Checking Size of InputThe product copies an input buffer to an output buffer without verifying that the size of the input buffer is less than the size of the output buffer.
Affected systems
Known conditions: network-reachable, no authentication, no user interaction (CVSS vector). Other conditions: not stated in public data.
Alpine4 products
- postgresql15< 15.17-r0
- postgresql16< 16.13-r0
- postgresql17< 17.9-r0
- postgresql18< 18.2-r0
Debian1 product
- postgresql-18< 18.2-1
Postgresql1 product
- postgresql≥ 18.0, < 18.2
Ubuntu1 product
- postgresql-9.3All versions (No fix recorded)
4 vendors · 7 products
