CVE-2025-58369

MEDIUMNVD 5.35.3—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 5.3 under NVD CVSS v3. EPSS exploit probability: 0.2%, top 52% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, nvd
5.3
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 0%CVSS: 5.3Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

fs2 is a compositional, streaming I/O library for Scala. Versions up to and including 2.5.12, 3.0.0-M1 through 3.12.2, and 3.13.0-M1 through 3.13.0-M6 are vulnerable to denial of service attacks though TLS sessions using fs2-io on the JVM using the fs2.io.net.tls package. When establishing a TLS session, if one side of the connection shuts down write while the peer side is awaiting more data to progress the TLS handshake, the peer side will spin loop on the socket read, fully utilizing a CPU. The CPU is consumed until the overall connection is closed, potentially shutting down a fs2-io powered server. This issue is fixed in versions 2.5.13, 3.12.1, and 3.13.0-M7.

CVSS v3
5.3
EG Score
5.3(medium)
EPSS
32.0%
KEV
Not listed

Published

September 5, 2025

Last Modified

April 15, 2026

References (7)

Affected Packages

(11 across 1 ecosystem)
Maven(11)
PackageVulnerable rangeFixed inDependents
co.fs2:fs2-io_0.262.4-4ed62ae ... 3.0-a355a2e (11 versions)——
co.fs2:fs2-io_0.272.4-0076a63 ... 3.0.0-M3 (145 versions)——
co.fs2:fs2-io_2.110.10.0 ... 2.1.0 (56 versions)——
co.fs2:fs2-io_2.120.10.0 ... 2.5.9 (206 versions)2.5.13—
co.fs2:fs2-io_2.12.0-M40.9.0-M1, 0.9.0-M2, 0.9.0-M3, 0.9.0-M4——
co.fs2:fs2-io_2.12.0-M50.9.0-M5, 0.9.0-M6, 0.9.0-RC1, 0.9.0-RC2——
co.fs2:fs2-io_2.12.0-RC10.9.0, 0.9.1——
co.fs2:fs2-io_2.12.0-RC20.9.1——
co.fs2:fs2-io_2.131.1.0-M1 ... 2.5.9 (165 versions)2.5.13—
co.fs2:fs2-io_2.13.0-M51.0.3, 1.0.4——
co.fs2:fs2-io_32.5-13-1a7ce3e ... 2.5.9 (27 versions)2.5.13—

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 11× in last 7d / 44× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. 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. Most recent first.

Showing the most recent 100 of 103 total refreshes for this CVE.

  1. 2026-07-12 05:46 UTCEPSS rescore
  2. 2026-07-11 08:27 UTCEPSS rescore
  3. 2026-07-11 08:27 UTCEPSS rescore
  4. 2026-07-10 07:23 UTCOSV refresh
  5. 2026-07-09 19:09 UTCEPSS rescore
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  1. 2026-06-24 14:04 UTCEPSS rescore
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  4. 2026-06-21 17:12 UTCOSV refresh
  5. 2026-06-21 14:56 UTCEPSS rescore
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  28. 2026-06-07 15:24 UTCEPSS rescore
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  30. 2026-06-06 13:47 UTCEPSS rescore
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  40. 2026-06-02 16:32 UTCOSV refresh
  41. 2026-06-01 13:51 UTCEPSS rescore
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  43. 2026-05-31 22:30 UTCEPSS rescore
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  45. 2026-05-31 00:16 UTCEPSS rescore
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  47. 2026-05-29 13:44 UTCEPSS rescore
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  62. 2026-05-24 16:57 UTCEPSS rescore
  63. 2026-05-23 00:09 UTCEG score recompute
  64. 2026-05-22 21:16 UTCEPSS rescore
  65. 2026-05-22 21:16 UTCEPSS rescore
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  67. 2026-05-21 22:43 UTCEPSS rescore
  68. 2026-05-21 08:31 UTCEG score recompute
  69. 2026-05-20 22:37 UTCEPSS rescore
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  74. 2026-05-20 11:21 UTCEPSS rescore
  75. 2026-05-20 11:21 UTCEPSS rescore

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Frequently asked(5)

What is CVE-2025-58369?
CVE-2025-58369 is a medium vulnerability published on September 5, 2025. fs2 is a compositional, streaming I/O library for Scala. Versions up to and including 2.5.12, 3.0.0-M1 through 3.12.2, and 3.13.0-M1 through 3.13.0-M6 are vulnerable to denial of service attacks though TLS sessions using fs2-io on the JVM using the fs2.io.net.tls package. When establishing a TLS…
When was CVE-2025-58369 disclosed?
CVE-2025-58369 was first published in the National Vulnerability Database on September 5, 2025, with the most recent update on April 15, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2025-58369 actively exploited?
CVE-2025-58369 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 32.0% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2025-58369?
CVE-2025-58369 has a CVSS v3 base score of 5.3 (NVD).
How do I remediate CVE-2025-58369?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2025-58369, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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