Npgsql is the .NET data provider for PostgreSQL. The WriteBind() method in src/Npgsql/Internal/NpgsqlConnector.FrontendMessages.cs uses int variables to store the message length and the sum of parameter lengths. Both variables overflow when the sum of parameter lengths becomes too large. This causes Npgsql to write a message size that is too small when constructing a Postgres protocol message to send it over the network to the database. When parsing the message, the database will only read a small number of bytes and treat any following bytes as new messages while they belong to the old message. Attackers can abuse this to inject arbitrary Postgres protocol messages into the connection, leading to the execution of arbitrary SQL statements on the application's behalf. This vulnerability is fixed in 4.0.14, 4.1.13, 5.0.18, 6.0.11, 7.0.7, and 8.0.3.
CVE-2024-32655
“—” beside the score: it is equal to NVD's CVSS score.
Score 8.1 from GitHub Security Advisory (severity: HIGH) published 2024-05-09. NVD baseline CVSS 8.1; sources differ by 0.0.
Also known asEUVD-2024-1856 (ENISA EUVD) · GHSA-x9vc-6hfv-hg8c (GitHub Security Advisories)Source: ENISA EUVD
- High severity, but no confirmed exploitation yet
A fix is available — apply it.
- CVSS v3
- 8.1
- EG Score
- 8.1HIGHmedium confidence
- EG Risk
- 52EG Risk 52/100
EG Risk is EchelonGraph's 0–100 priority score. It fuses impact severity (EG Severity, the CVSS base score, never the KEV-floored or EPSS-lifted EG Score) with real-world exploitation and automatability, under weights EchelonGraph set by hand, so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner.
How it’s computed (value × EchelonGraph’s weight)Severity81% × 45%Impact severity (EG Severity): CVSS 8.1 of 10. Never the KEV-floored or EPSS-lifted EG Score.Exploitation1.7% × 40%FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.Automatability100% × 15%CISA's SSVC Automatable value: yes (Vulnrichment).SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Attend at high (mission-essential systems).Exploitation none (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.Action: A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high. - EPSS PROB
- 1.7%
- EPSS %ILE
- 77th
- KEV
- Not listed
What the EG score is made of (scorer v4.0: the three questions the 0–10 score mixes, published apart · methodology)
The EG score (8.1): severity, escalated by confirmed exploitation. This CVE's 8.1 is its impact severity (EG Severity), not escalated.
- EG Severity
- 8.1 HIGHCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.GitHub Security Advisory CVSS
- EG Likelihood
- 1.7% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-10-31). FIRST's exploitation probability, not an EchelonGraph model.
- Confirmed exploitation
- None on record (CISA KEV, EG-KEV Tier 1)Reported apart from the likelihood: an observed fact, not a probability.
- EG Priority
- SSVC Track at medium mission impactTrack at low or medium mission impact; Attend at high (mission-essential systems).CISA BOD 26-04: 3 days if the affected system is publicly exposed; 60 days if it is not.Each input and its source, and whom BOD 26-04 binds: the SSVC and BOD 26-04 blocks below.
SSVC (CISA's decision table, applied by EchelonGraph)Track at low or medium mission impact; Attend at high (mission-essential systems).
A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.
Exploitation none (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table
BOD 26-04 (CISA's remediation timeline, Table 1)3 days if the affected system is publicly exposed; 60 days if it is not.
The score's inputs: In CISA KEV no (CISA's KEV catalog) · Automatable yes (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it
Published
May 14, 2024
Last Modified
April 15, 2026
Advisory Details (10)
Auto-updated Sep 16, 2026v5.0.18
Patch available: npgsql/npgsql v5.0.18
https://github.com/npgsql/npgsql/releases/tag/v5.0.18v4.1.13
Patch available: npgsql/npgsql v4.1.13
https://github.com/npgsql/npgsql/releases/tag/v4.1.13v4.0.14
Patch available: npgsql/npgsql v4.0.14
https://github.com/npgsql/npgsql/releases/tag/v4.0.14commit f7e7ead0702d (npgsql/npgsql)
Fix landed in npgsql/npgsql commit f7e7ead0702d — awaiting tagged release
https://github.com/npgsql/npgsql/commit/f7e7ead0702d776a8f551f5786c4cac2d65c4bc6commit e34e2ba8042e (npgsql/npgsql)
Patch available: npgsql/npgsql v4.0.16 (contains commit e34e2ba8042e)
https://github.com/npgsql/npgsql/commit/e34e2ba8042e666d9af54a1b255fba4d5b11df56commit a22a42d8141d (npgsql/npgsql)
Patch available: npgsql/npgsql v7.0.7 (contains commit a22a42d8141d)
https://github.com/npgsql/npgsql/commit/a22a42d8141d7a3528f43c02c095a409507cf1afcommit 703d9af8fa48 (npgsql/npgsql)
Patch available: npgsql/npgsql v6.0.11 (contains commit 703d9af8fa48)
https://github.com/npgsql/npgsql/commit/703d9af8fa48dfe8c0180e36edb8278f34342d7bcommit 67acbe027e28 (npgsql/npgsql)
Patch available: npgsql/npgsql v4.1.13 (contains commit 67acbe027e28)
https://github.com/npgsql/npgsql/commit/67acbe027e28477ac2199e15cfb554bb2ffaf169commit 3183efb2bdcc (npgsql/npgsql)
Patch available: npgsql/npgsql v5.0.18 (contains commit 3183efb2bdcc)
https://github.com/npgsql/npgsql/commit/3183efb2bdcca159c8c2e22af57e18ea8f853cf0commit 091655eed0c8 (npgsql/npgsql)
Patch available: npgsql/npgsql v8.0.3 (contains commit 091655eed0c8)
https://github.com/npgsql/npgsql/commit/091655eed0c84e502ab424950c930339d17c1928Patch Availability(6)
| Vendor / Ecosystem | Fix (by version range) / Patch | Released | Source |
|---|---|---|---|
| nuget | Npgsql @ 8.0.3 (fixes >= 8.0.0, < 8.0.3) | — | ghsa |
| nuget | Npgsql @ 4.0.14 (fixes <= 4.0.13) | — | ghsa |
| nuget | Npgsql @ 4.1.13 (fixes >= 4.1.0, < 4.1.13) | — | ghsa |
| nuget | Npgsql @ 5.0.18 (fixes >= 5.0.0, < 5.0.18) | — | ghsa |
| nuget | Npgsql @ 6.0.11 (fixes >= 6.0.0, < 6.0.11) | — | ghsa |
| nuget | Npgsql @ 7.0.7 (fixes >= 7.0.0, < 7.0.7) | — | ghsa |
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
(1 across 1 ecosystem)
NuGet(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| Npgsql | 7.0.0, 7.0.1, 7.0.2, 7.0.4, 7.0.6 |
| — |
Weakness Classification(2)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Data Freshness Timeline
(refreshed 10× in last 7d / 39× in last 30d)
Each row is a time one of our pipelines fetched, updated or re-scored this CVE. 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. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.
Showing the most recent 94 of 237 refreshes on record for this CVE.
A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. 6 repeat rows among the latest 100 are merged into the row they repeat. The 143 oldest rows on record are not shown and were not checked, so the counts can still include repeats.
- 2026-11-01 16:31 UTCEPSS rescoreEPSS 1.7% · 77th percentile
- 2026-11-01 08:14 UTCGHSA enrichmentGHSA-x9vc-6hfv-hg8c · GitHub severity HIGH · GitHub CVSS 8.1
- 2026-11-01 08:14 UTCEG score recompute
- 2026-10-31 16:30 UTCEPSS rescoreEPSS 1.7% · 77th percentile
- 2026-10-30 16:32 UTCEPSS rescoreEPSS 1.7% · 77th percentile
- 2026-10-29 16:30 UTCEPSS rescoreEPSS 1.7% · 77th percentile
- 2026-10-28 16:29 UTCEPSS rescoreEPSS 1.7% · 77th percentile
- 2026-10-27 19:50 UTCEG score recompute
- 2026-10-27 16:29 UTCEPSS rescoreEPSS 1.7% · 77th percentile
- 2026-10-26 16:29 UTCEPSS rescoreEPSS 1.7% · 77th percentile
- 2026-10-25 17:11 UTCEG score recompute
- 2026-10-25 16:30 UTCEPSS rescoreEPSS 1.7% · 77th percentile
- 2026-10-24 16:30 UTCEPSS rescoreEPSS 1.7% · 77th percentile
- 2026-10-23 16:29 UTCEPSS rescoreEPSS 1.7% · 77th percentile
- 2026-10-22 16:31 UTCEPSS rescoreEPSS 1.7% · 77th percentile
- 2026-10-21 16:29 UTCEPSS rescoreEPSS 1.7% · 77th percentile
- 2026-10-20 19:57 UTCEG score recompute
- 2026-10-20 16:30 UTCEPSS rescoreEPSS 1.7% · 77th percentile
- 2026-10-19 16:29 UTCEPSS rescoreEPSS 1.7% · 77th percentile
- 2026-10-18 16:29 UTCEPSS rescoreEPSS 1.7% · 77th percentile
- 2026-10-18 07:16 UTCEG score recompute
- 2026-10-17 16:30 UTCEPSS rescoreEPSS 1.7% · 77th percentile
- 2026-10-16 16:36 UTCEPSS rescoreEPSS 1.7% · 77th percentile
- 2026-10-15 16:30 UTCEPSS rescoreEPSS 1.7% · 76th percentile
- 2026-10-14 16:30 UTCEPSS rescoreEPSS 1.7% · 76th percentile
Show 69 moreShow fewer
- 2026-10-13 16:30 UTCEPSS rescoreEPSS 1.7% · 76th percentile
- 2026-10-12 17:55 UTCEG score recompute
- 2026-10-12 16:31 UTCEPSS rescoreEPSS 1.7% · 76th percentile
- 2026-10-11 21:19 UTCEG score recompute
- 2026-10-11 16:12 UTCEG score recompute
- 2026-10-11 13:46 UTCEPSS rescoreEPSS 1.7% · 76th percentile
- 2026-10-10 19:58 UTCEPSS rescoreEPSS 1.7% · 76th percentile
- 2026-10-09 20:05 UTCEPSS rescoreEPSS 1.7% · 76th percentile
- 2026-10-08 17:07 UTCEPSS rescoreEPSS 1.7% · 76th percentile
- 2026-10-07 23:46 UTCEPSS rescoreEPSS 1.7% · 76th percentile
- 2026-10-07 12:54 UTCOSV refresh
- 2026-10-06 15:15 UTCEPSS rescoreEPSS 1.7% · 76th percentile
- 2026-10-05 17:41 UTCEPSS rescoreEPSS 1.7% · 76th percentile
- 2026-10-04 23:20 UTCEPSS rescoreEPSS 1.7% · 76th percentile
- 2026-10-03 14:24 UTCEPSS rescoreEPSS 1.7% · 76th percentile
- 2026-10-01 19:48 UTCEPSS rescoreEPSS 1.7% · 76th percentile
- 2026-09-30 19:43 UTCEG score recompute
- 2026-09-30 15:01 UTCEPSS rescoreEPSS 1.7% · 76th percentile
- 2026-09-29 15:17 UTCEPSS rescoreEPSS 1.7% · 76th percentile
- 2026-09-28 13:49 UTCEPSS rescoreEPSS 1.7% · 76th percentile
- 2026-09-27 13:43 UTCEPSS rescoreEPSS 1.7% · 76th percentile
- 2026-09-26 15:57 UTCEPSS rescoreEPSS 1.7% · 76th percentile
- 2026-09-26 00:23 UTCEPSS rescoreEPSS 1.7% · 76th percentile
- 2026-09-24 14:01 UTCEPSS rescoreEPSS 1.7% · 76th percentile
- 2026-09-23 13:46 UTCEPSS rescoreEPSS 1.7% · 76th percentile
- 2026-09-22 14:46 UTCEPSS rescoreEPSS 1.7% · 76th percentile
- 2026-09-20 20:14 UTCEPSS rescoreEPSS 1.7% · 76th percentile
- 2026-09-19 15:40 UTCEPSS rescoreEPSS 1.7% · 76th percentile
- 2026-09-18 19:26 UTCEPSS rescoreEPSS 1.7% · 76th percentile
- 2026-09-17 18:50 UTCOSV refresh
- 2026-09-16 14:06 UTCEPSS rescoreEPSS 1.7% · 76th percentile
- 2026-09-15 03:08 UTCEPSS rescoreEPSS 1.7% · 76th percentile
- 2026-09-13 16:45 UTCEPSS rescoreEPSS 1.7% · 76th percentile
- 2026-09-12 14:59 UTCEPSS rescoreEPSS 1.7% · 76th percentile
- 2026-09-11 14:51 UTCEPSS rescoreEPSS 1.7% · 76th percentile
- 2026-09-11 09:35 UTCEPSS rescoreEPSS 1.7% · 76th percentile
- 2026-09-08 21:58 UTCEPSS rescoreEPSS 1.7% · 75th percentile
- 2026-09-07 15:59 UTCEPSS rescoreEPSS 1.7% · 75th percentile
- 2026-09-06 13:46 UTCEPSS rescoreEPSS 1.7% · 75th percentile
- 2026-09-05 15:26 UTCEPSS rescoreEPSS 1.7% · 75th percentile
- 2026-09-04 13:58 UTCEPSS rescoreEPSS 1.7% · 75th percentile
- 2026-09-04 05:05 UTCEPSS rescoreEPSS 1.7% · 75th percentile
- 2026-09-02 14:10 UTCEPSS rescoreEPSS 1.7% · 75th percentile
- 2026-09-01 13:52 UTCEPSS rescoreEPSS 1.7% · 75th percentile
- 2026-08-30 19:15 UTCEPSS rescoreEPSS 1.7% · 75th percentile
- 2026-08-30 01:20 UTCEPSS rescoreEPSS 1.7% · 75th percentile
- 2026-08-29 19:13 UTCOSV refresh
- 2026-08-28 21:39 UTCEPSS rescoreEPSS 1.7% · 75th percentile
- 2026-08-27 14:23 UTCEPSS rescoreEPSS 1.7% · 75th percentile
- 2026-08-26 14:44 UTCEPSS rescoreEPSS 1.7% · 75th percentile
- 2026-08-25 13:47 UTCEPSS rescoreEPSS 1.7% · 75th percentile
- 2026-08-24 14:15 UTCEPSS rescoreEPSS 1.7% · 75th percentile
- 2026-08-23 00:17 UTCEPSS rescoreEPSS 1.7% · 75th percentile
- 2026-08-21 23:47 UTCEPSS rescoreEPSS 1.7% · 75th percentile
- 2026-08-20 22:53 UTCEPSS rescoreEPSS 1.7% · 75th percentile
- 2026-08-19 17:02 UTCEPSS rescoreEPSS 1.7% · 75th percentile
- 2026-08-18 13:46 UTCEPSS rescoreEPSS 1.7% · 75th percentile
- 2026-08-17 13:45 UTCEPSS rescoreEPSS 1.7% · 75th percentile
- 2026-08-16 14:54 UTCEPSS rescoreEPSS 1.7% · 75th percentile
- 2026-08-16 02:13 UTCEPSS rescoreEPSS 1.7% · 75th percentile
- 2026-08-15 01:28 UTCEPSS rescoreEPSS 1.7% · 75th percentile
- 2026-08-13 21:59 UTCEPSS rescoreEPSS 1.7% · 75th percentile
- 2026-08-13 05:50 UTCOSV refresh
- 2026-08-12 13:49 UTCEPSS rescoreEPSS 1.7% · 75th percentile
- 2026-08-11 13:40 UTCEPSS rescoreEPSS 1.7% · 75th percentile
- 2026-08-10 23:58 UTCEPSS rescoreEPSS 1.7% · 75th percentile
- 2026-08-09 13:45 UTCEPSS rescoreEPSS 1.7% · 75th percentile
- 2026-08-08 16:35 UTCEPSS rescoreEPSS 1.7% · 75th percentile
- 2026-08-07 16:25 UTCEPSS rescoreEPSS 1.7% · 75th percentile
Related CVEs(same CWE)
Same CWE
10 shownCWE-89 · CWE-190
Frequently asked(5)
What is CVE-2024-32655?
When was the CVE record for CVE-2024-32655 published?
Is CVE-2024-32655 actively exploited?
What is the CVSS score of CVE-2024-32655?
How do I remediate CVE-2024-32655?
Dependency Blast Radius
See which npm, PyPI, Go, and Maven packages are affected by CVE-2024-32655
Is Your Infrastructure Affected by CVE-2024-32655?
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