Multipart form parsing can consume large amounts of CPU and memory when processing form inputs containing very large numbers of parts. This stems from several causes: 1. mime/multipart.Reader.ReadForm limits the total memory a parsed multipart form can consume. ReadForm can undercount the amount of memory consumed, leading it to accept larger inputs than intended. 2. Limiting total memory does not account for increased pressure on the garbage collector from large numbers of small allocations in forms with many parts. 3. ReadForm can allocate a large number of short-lived buffers, further increasing pressure on the garbage collector. The combination of these factors can permit an attacker to cause an program that parses multipart forms to consume large amounts of CPU and memory, potentially resulting in a denial of service. This affects programs that use mime/multipart.Reader.ReadForm, as well as form parsing in the net/http package with the Request methods FormFile, FormValue, ParseMultipartForm, and PostFormValue. With fix, ReadForm now does a better job of estimating the memory consumption of parsed forms, and performs many fewer short-lived allocations. In addition, the fixed mime/multipart.Reader imposes the following limits on the size of parsed forms: 1. Forms parsed with ReadForm may contain no more than 1000 parts. This limit may be adjusted with the environment variable GODEBUG=multipartmaxparts=. 2. Form parts parsed with NextPart and NextRawPart may contain no more than 10,000 header fields. In addition, forms parsed with ReadForm may contain no more than 10,000 header fields across all parts. This limit may be adjusted with the environment variable GODEBUG=multipartmaxheaders=.
CVE-2023-24536
“—” beside the score: it is equal to NVD's CVSS score.
Score 7.5 from GitHub Security Advisory (severity: HIGH) published 2023-04-06. NVD baseline CVSS 7.5; sources differ by 0.0.
Also known asEUVD-2023-28552 (ENISA EUVD) · GHSA-9f7g-gqwh-jpf5 (GitHub Security Advisories)Source: ENISA EUVD
- High severity, but no confirmed exploitation yet
A fix is available — apply it.
- CVSS v3
- 7.5
- EG Score
- 7.5HIGHmedium confidence
- EG Risk
- 34EG Risk 34/100
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)Severity75% × 45%Impact severity (EG Severity): CVSS 7.5 of 10. Never the KEV-floored or EPSS-lifted EG Score.Exploitation1.5% × 40%FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.Automatability0% × 15%CISA's SSVC Automatable value: no (Vulnrichment).SSVC (CISA's decision table, applied by EchelonGraph): Track at every mission impact level.Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (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. - EPSS PROB
- 1.5%
- EPSS %ILE
- 73rd
- 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 (7.5): severity, escalated by confirmed exploitation. This CVE's 7.5 is its impact severity (EG Severity), not escalated.
- EG Severity
- 7.5 HIGHCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.GitHub Security Advisory CVSS
- EG Likelihood
- 1.5% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-10-27). 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 every mission impact level.CISA BOD 26-04: 60 days if the affected system is publicly exposed; Fix on system upgrade 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 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). 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)60 days if the affected system is publicly exposed; Fix on system upgrade if it is not.
The score's inputs: In CISA KEV no (CISA's KEV catalog) · Automatable no (CISA Vulnrichment) · Technical impact partial (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
April 6, 2023
Last Modified
February 12, 2025
Advisory Details (8)
Auto-updated Oct 27, 2026Go: Multiple Vulnerabilities (GLSA 202311-09) — Gentoo security
https://security.gentoo.org/glsa/202311-09net/http, net/textproto, mime/multipart: denial of service from excessive resource consumption (CVE-2023-24536) · Issue #59153 · golang/go · GitHub
https://go.dev/issue/59153Vendor Advisories for CVE-2023-24536(20)
These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.
- CVE-2023-24536Microsoft Security Response Center (MSRC)High
Excessive resource consumption in net/http, net/textproto and mime/multipart
- RHSA-2024:2944Red Hat Product SecurityHigh
Red Hat Security Advisory: AMQ Broker 7.12.0.OPR.1.GA Container Images release and security update
- RHSA-2023:6939Red Hat Product SecurityMedium
Red Hat Security Advisory: container-tools:rhel8 security and bug fix update
- RHSA-2023:6938Red Hat Product SecurityMedium
Red Hat Security Advisory: container-tools:4.0 security and bug fix update
- RHSA-2023:6346Red Hat Product SecurityMedium
Red Hat Security Advisory: toolbox security and bug fix update
- RHSA-2023:6402Red Hat Product SecurityMedium
Red Hat Security Advisory: containernetworking-plugins security and bug fix update
- RHSA-2023:6474Red Hat Product SecurityMedium
Red Hat Security Advisory: podman security, bug fix, and enhancement update
- RHSA-2023:6473Red Hat Product SecurityMedium
Red Hat Security Advisory: buildah security update
- +12 more
Patch Availability(30)
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
(3 across 3 ecosystems)
Debian:11(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| golang-1.15 | 1.15.15-1 ... 1.15.9-6 (10 versions) |
| — |
Debian:12(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| golang-1.19 | — |
| — |
Go(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| stdlib | — |
| — |
Weakness Classification(2)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Additional Vendor Advisories
(13)
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.
- Red HatRHSA-2023:3167MODERATE2023-04-04
RHSA-2023:3167 — Moderate
- Red HatRHSA-2023:3318MODERATE2023-04-04
RHSA-2023:3318 — Moderate
- Red HatRHSA-2023:3319MODERATE2023-04-04
RHSA-2023:3319 — Moderate
- Red HatRHSA-2023:3367MODERATE2023-04-04
RHSA-2023:3367 — Moderate
- Red HatRHSA-2023:3445MODERATE2023-04-04
RHSA-2023:3445 — Moderate
- Red HatRHSA-2023:3450MODERATE2023-04-04
RHSA-2023:3450 — Moderate
- Red HatRHSA-2023:3455MODERATE2023-04-04
RHSA-2023:3455 — Moderate
- Red HatRHSA-2023:3536MODERATE2023-04-04
RHSA-2023:3536 — Moderate
- Red HatRHSA-2023:3540MODERATE2023-04-04
RHSA-2023:3540 — Moderate
- Red HatRHSA-2023:3612MODERATE2023-04-04
RHSA-2023:3612 — Moderate
- Red HatRHSA-2023:3624MODERATE2023-04-04
RHSA-2023:3624 — Moderate
- Red HatRHSA-2023:3918MODERATE2023-04-04
RHSA-2023:3918 — Moderate
- Red HatRHSA-2023:4335MODERATE2023-04-04
RHSA-2023:4335 — Moderate
Data Freshness Timeline
(refreshed 10× in last 7d / 40× 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 98 of 222 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. 2 repeat rows among the latest 100 are merged into the row they repeat. The 124 oldest rows on record are not shown and were not checked, so the counts can still include repeats.
- 2026-11-02 16:39 UTCEPSS rescoreEPSS 1.5% · 73rd percentile
- 2026-11-01 16:30 UTCEPSS rescoreEPSS 1.5% · 73rd percentile
- 2026-10-31 16:29 UTCEPSS rescoreEPSS 1.5% · 73rd percentile
- 2026-10-30 16:31 UTCEPSS rescoreEPSS 1.5% · 73rd percentile
- 2026-10-29 16:30 UTCEPSS rescoreEPSS 1.5% · 73rd percentile
- 2026-10-28 16:29 UTCEPSS rescoreEPSS 1.5% · 73rd percentile
- 2026-10-27 21:45 UTCEG score recompute
- 2026-10-27 21:45 UTCVendor advisory
- 2026-10-27 21:45 UTCGHSA enrichmentGHSA-9f7g-gqwh-jpf5 · GitHub severity HIGH · GitHub CVSS 7.5
- 2026-10-27 16:29 UTCEPSS rescoreEPSS 1.5% · 73rd percentile
- 2026-10-26 16:28 UTCEPSS rescoreEPSS 1.5% · 73rd percentile
- 2026-10-25 17:47 UTCEG score recompute
- 2026-10-25 16:29 UTCEPSS rescoreEPSS 1.5% · 73rd percentile
- 2026-10-24 16:29 UTCEPSS rescoreEPSS 1.5% · 73rd percentile
- 2026-10-23 16:29 UTCEPSS rescoreEPSS 1.5% · 73rd percentile
- 2026-10-22 16:30 UTCEPSS rescoreEPSS 1.5% · 73rd percentile
- 2026-10-21 16:29 UTCEPSS rescoreEPSS 1.5% · 73rd percentile
- 2026-10-21 04:50 UTCEG score recompute
- 2026-10-21 04:50 UTCVendor advisory
- 2026-10-21 04:50 UTCGHSA enrichmentGHSA-9f7g-gqwh-jpf5 · GitHub severity HIGH · GitHub CVSS 7.5
- 2026-10-20 16:29 UTCEPSS rescoreEPSS 1.5% · 73rd percentile
- 2026-10-19 16:29 UTCEPSS rescoreEPSS 1.5% · 73rd percentile
- 2026-10-18 16:29 UTCEPSS rescoreEPSS 1.5% · 73rd percentile
- 2026-10-18 08:11 UTCEG score recompute
- 2026-10-17 16:29 UTCEPSS rescoreEPSS 1.5% · 73rd percentile
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- 2026-10-16 16:35 UTCEPSS rescoreEPSS 1.5% · 73rd percentile
- 2026-10-15 16:29 UTCEPSS rescoreEPSS 1.5% · 73rd percentile
- 2026-10-14 16:29 UTCEPSS rescoreEPSS 1.5% · 73rd percentile
- 2026-10-14 13:24 UTCOSV refresh
- 2026-10-13 16:29 UTCEPSS rescoreEPSS 1.5% · 73rd percentile
- 2026-10-12 18:34 UTCEG score recompute
- 2026-10-12 16:30 UTCEPSS rescoreEPSS 1.5% · 73rd percentile
- 2026-10-11 21:58 UTCEG score recompute
- 2026-10-11 13:45 UTCEPSS rescoreEPSS 1.5% · 73rd percentile
- 2026-10-10 19:57 UTCEPSS rescoreEPSS 1.5% · 73rd percentile
- 2026-10-09 20:05 UTCEPSS rescoreEPSS 1.5% · 73rd percentile
- 2026-10-08 17:05 UTCEPSS rescoreEPSS 1.5% · 73rd percentile
- 2026-10-07 23:45 UTCEPSS rescoreEPSS 1.5% · 73rd percentile
- 2026-10-06 15:14 UTCEPSS rescoreEPSS 1.5% · 73rd percentile
- 2026-10-05 17:40 UTCEPSS rescoreEPSS 1.5% · 73rd percentile
- 2026-10-03 14:23 UTCEPSS rescoreEPSS 1.5% · 72nd percentile
- 2026-10-02 16:23 UTCEPSS rescoreEPSS 1.5% · 72nd percentile
- 2026-10-01 19:47 UTCEPSS rescoreEPSS 1.5% · 72nd percentile
- 2026-09-30 16:18 UTCEG score recompute
- 2026-09-30 15:01 UTCEPSS rescoreEPSS 1.5% · 72nd percentile
- 2026-09-29 15:16 UTCEPSS rescoreEPSS 1.5% · 72nd percentile
- 2026-09-26 15:55 UTCEPSS rescoreEPSS 1.5% · 72nd percentile
- 2026-09-26 00:22 UTCEPSS rescoreEPSS 1.5% · 72nd percentile
- 2026-09-24 14:01 UTCEPSS rescoreEPSS 1.5% · 72nd percentile
- 2026-09-23 15:47 UTCOSV refresh
- 2026-09-23 13:45 UTCEPSS rescoreEPSS 1.5% · 72nd percentile
- 2026-09-22 14:45 UTCEPSS rescoreEPSS 1.5% · 72nd percentile
- 2026-09-19 15:38 UTCEPSS rescoreEPSS 1.5% · 72nd percentile
- 2026-09-18 19:25 UTCEPSS rescoreEPSS 1.5% · 72nd percentile
- 2026-09-17 19:24 UTCEPSS rescoreEPSS 1.5% · 72nd percentile
- 2026-09-16 14:05 UTCEPSS rescoreEPSS 1.5% · 72nd percentile
- 2026-09-16 05:11 UTCEPSS rescoreEPSS 1.5% · 72nd percentile
- 2026-09-15 03:07 UTCEPSS rescoreEPSS 1.5% · 72nd percentile
- 2026-09-13 16:44 UTCEPSS rescoreEPSS 1.5% · 72nd percentile
- 2026-09-12 14:58 UTCEPSS rescoreEPSS 1.5% · 72nd percentile
- 2026-09-11 09:34 UTCEPSS rescoreEPSS 1.5% · 72nd percentile
- 2026-09-08 21:57 UTCEPSS rescoreEPSS 1.5% · 72nd percentile
- 2026-09-07 15:59 UTCEPSS rescoreEPSS 1.5% · 72nd percentile
- 2026-09-06 13:45 UTCEPSS rescoreEPSS 1.5% · 72nd percentile
- 2026-09-05 15:25 UTCEPSS rescoreEPSS 1.5% · 71st percentile
- 2026-09-04 13:57 UTCEPSS rescoreEPSS 1.5% · 72nd percentile
- 2026-09-04 10:29 UTCOSV refresh
- 2026-09-04 05:04 UTCEPSS rescoreEPSS 1.5% · 72nd percentile
- 2026-09-02 14:09 UTCEPSS rescoreEPSS 1.5% · 72nd percentile
- 2026-09-01 13:51 UTCEPSS rescoreEPSS 1.5% · 72nd percentile
- 2026-08-30 19:15 UTCEPSS rescoreEPSS 1.5% · 72nd percentile
- 2026-08-30 01:19 UTCEPSS rescoreEPSS 1.5% · 71st percentile
- 2026-08-28 21:38 UTCEPSS rescoreEPSS 1.5% · 71st percentile
- 2026-08-27 14:22 UTCEPSS rescoreEPSS 1.5% · 71st percentile
- 2026-08-26 14:43 UTCEPSS rescoreEPSS 1.5% · 71st percentile
- 2026-08-25 13:46 UTCEPSS rescoreEPSS 1.5% · 71st percentile
- 2026-08-24 14:14 UTCEPSS rescoreEPSS 1.5% · 71st percentile
- 2026-08-23 00:17 UTCEPSS rescoreEPSS 1.5% · 71st percentile
- 2026-08-21 23:46 UTCEPSS rescoreEPSS 1.5% · 71st percentile
- 2026-08-20 22:53 UTCEPSS rescoreEPSS 1.5% · 71st percentile
- 2026-08-19 17:01 UTCEPSS rescoreEPSS 1.5% · 71st percentile
- 2026-08-18 13:46 UTCEPSS rescoreEPSS 1.5% · 71st percentile
- 2026-08-17 21:00 UTCOSV refresh
- 2026-08-17 13:44 UTCEPSS rescoreEPSS 1.5% · 71st percentile
- 2026-08-16 14:53 UTCEPSS rescoreEPSS 1.5% · 71st percentile
- 2026-08-16 02:12 UTCEPSS rescoreEPSS 1.5% · 71st percentile
- 2026-08-15 01:27 UTCEPSS rescoreEPSS 1.5% · 71st percentile
- 2026-08-13 21:58 UTCEPSS rescoreEPSS 1.5% · 71st percentile
- 2026-08-12 13:48 UTCEPSS rescoreEPSS 1.5% · 71st percentile
- 2026-08-09 13:44 UTCEPSS rescoreEPSS 1.5% · 71st percentile
- 2026-08-08 16:34 UTCEPSS rescoreEPSS 1.5% · 71st percentile
- 2026-08-07 16:24 UTCEPSS rescoreEPSS 1.5% · 71st percentile
- 2026-08-06 13:44 UTCEPSS rescoreEPSS 1.5% · 71st percentile
- 2026-08-05 19:15 UTCEPSS rescoreEPSS 1.5% · 71st percentile
- 2026-08-04 15:07 UTCEPSS rescoreEPSS 1.5% · 71st percentile
- 2026-08-04 10:35 UTCEPSS rescoreEPSS 1.5% · 71st percentile
- 2026-08-03 10:34 UTCEPSS rescoreEPSS 1.5% · 71st percentile
- 2026-08-02 16:57 UTCOSV refresh
Related CVEs(same product + same vendor + same CWE)
Same product
10 shownDebian:12:golang-1.19
Same vendor
10 shownredhat:RHBA-2023:4275 · redhat:RHSA-2023:6346
Same CWE
10 shownCWE-400 · CWE-770
Frequently asked(5)
What is CVE-2023-24536?
When was the CVE record for CVE-2023-24536 published?
Is CVE-2023-24536 actively exploited?
What is the CVSS score of CVE-2023-24536?
How do I remediate CVE-2023-24536?
Dependency Blast Radius
See which npm, PyPI, Go, and Maven packages are affected by CVE-2023-24536
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