CVE-2025-50180: esm-dev esm.sh Server-Side Request Forgery (SSRF)
CVSS: 8.7v4.0HighAnalyzed
AliasesGHSA-3c9r-837r-qqm4GO-2026-4545
Published 25-02-2026Last modified 27-02-2026
Vulnerability summary
CVE-2025-50180 is a high (CVSS 8.7) Server-Side Request Forgery (SSRF) vulnerability in esm-dev esm.sh. EPSS estimates a 0.40% chance of exploitation in the next 30 days, higher than 32.2% of scored vulnerabilities. 1 public exploit is recorded.
CVSS score
8.7/10
010
High · v4.0 (CVE.org)EPSS score
0.40%
0%100%
Low · +0.01 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits1github
Advisory lineage
Upstream 0 · Downstream 2 · Related 2Timeline
- 25-02-2026PublishedVulnerability first disclosed.
- 27-02-2026Last modifiedVulnerability information updated.
Description
esm.sh is a no-build content delivery network (CDN) for web development. In version 136, esm.sh is vulnerable to a full-response SSRF, allowing an attacker to retrieve information from internal websites through the vulnerability. Version 137 fixes the vulnerability.
CVSS metrics
4 scores · 3 sources · 2 versionsHigh 8.7Preferred score · CVE.org (CNA)
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:NSourcesAll 3 agree
- OSV · GoEcosystem advisory · calculated8.7HighCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N
- NVDNIST8.7HighCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
High 7.5Preferred score · NVD (NIST)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:NSourcesSingle source
EPSS trend
Probability
0.40%
Chance of exploitation in the next 30 days
Percentile
32%
Versus all other CVEs
30-day change
+0.01 pp
From 0.38% on 18-09-2026
18-09-202618-10-2026
EPSS score0.40%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
1 foundEsm.Sh
Maturity: poc
Weaknesses
CWE · root causeAffected systems
Esm1 product
- esm.sh< 137
Esm-dev1 product
- esm.sh= 136
Github.com/esm-dev1 product
- esm.sh< 0.0.0-20250616164159-0593516c4cfa
3 vendors · 3 products
References
8 links- github.com/esm-dev/esm.sh/security/advisories/GHSA-3c9r-837r-qqm4X Refsource CONFIRMWEBAdvisoryExploitMitigationPatchVendor Advisory
- github.com/esm-dev/esm.sh/commit/0593516c4cfab49ad3b4900416a8432ff2e23eb0X Refsource MISCWEBFIXPatch
- github.com/esm-dev/esm.sh/blob/f80ff8c8d58749e77fa964abde468fc61f8bd89e/internal/fetch/fetch.goX Refsource MISCWEBPatch
- github.com/esm-dev/esm.sh/blob/f80ff8c8d58749e77fa964abde468fc61f8bd89e/server/router.goX Refsource MISCWEBPatch
- github.com/esm-dev/esm.shPACKAGE