CVE-2026-31048

CRITICALNVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

This critical-severity CVE scores 9.8 under NVD CVSS v3. EPSS exploit probability: 0.1%, top 73% 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
9.8
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 1%CVSS: 9.8Exploit: NoneExposed: 0

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

An issue in the pickle protocol of Pyro v3.x allows attackers to execute arbitrary code via supplying a crafted pickled string message.

CVSS v3
9.8
EG Score
9.8(medium)
EPSS
43.3%
KEV
Not listed

Published

April 13, 2026

Last Modified

April 27, 2026

Advisory Details (3)

Auto-updated May 10, 2026
Patch available. Sources: github.
generic

Pyro3/docs/9-security.html at master · irmen/Pyro3 · GitHub

https://github.com/irmen/Pyro3/blob/master/docs/9-security.html#L341-L346
generic

Pyro3/Pyro/protocol.py at master · irmen/Pyro3 · GitHub

https://github.com/irmen/Pyro3/blob/master/Pyro/protocol.py#L672-L711
github Patch Available

Unsafe pickle deserialization in Pyro 3.x leads to unauthenticated remote code execution · Advisory · Sif-0x01/security-advisories · GitHub

https://github.com/Sif-0x01/security-advisories/security/advisories/GHSA-7625-w9h5-83rv

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 128 total refreshes for this CVE.

  1. 2026-07-16 17:03 UTCEPSS rescore
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  22. 2026-06-15 04:03 UTCEG score recompute
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  28. 2026-06-12 04:20 UTCEG score recompute
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  75. 2026-05-29 13:44 UTCEPSS rescore

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Frequently asked(5)

What is CVE-2026-31048?
CVE-2026-31048 is a critical vulnerability published on April 13, 2026. An issue in the <code>pickle</code> protocol of Pyro v3.x allows attackers to execute arbitrary code via supplying a crafted pickled string message.
When was CVE-2026-31048 disclosed?
CVE-2026-31048 was first published in the National Vulnerability Database on April 13, 2026, with the most recent update on April 27, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-31048 actively exploited?
CVE-2026-31048 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 43.3% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-31048?
CVE-2026-31048 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2026-31048?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-31048, 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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