CVE-2020-9760

CRITICALNVD 9.89.8—Trending — 4 sources updated this week

9.8

An issue was discovered in WeeChat before 2.7.1 (0.3.4 to 2.7 are affected). When a new IRC message 005 is received with longer nick prefixes, a buffer overflow and possibly a crash can happen when a new mode is set for a nick.

CVSS v3: 9.8
EG Score: 9.8(medium)
EPSS: 77.8%
KEV: Not listed

Published

March 23, 2020

Last Modified

November 21, 2024

References (10)

cve@mitrehttps://github.com/weechat/weechat/commit/40ccacb4330a64802b1f1e28ed9a6b6d3ca9197f
cve@mitrehttps://lists.debian.org/debian-lts-announce/2020/03/msg00031.html
cve@mitrehttps://lists.debian.org/debian-lts-announce/2021/09/msg00018.html
cve@mitrehttps://security.gentoo.org/glsa/202003-51
cve@mitrehttps://weechat.org/doc/security/
af854a3a-2127-422b-91ae-364da2661108https://github.com/weechat/weechat/commit/40ccacb4330a64802b1f1e28ed9a6b6d3ca9197f
af854a3a-2127-422b-91ae-364da2661108https://lists.debian.org/debian-lts-announce/2020/03/msg00031.html
af854a3a-2127-422b-91ae-364da2661108https://lists.debian.org/debian-lts-announce/2021/09/msg00018.html
af854a3a-2127-422b-91ae-364da2661108https://security.gentoo.org/glsa/202003-51
af854a3a-2127-422b-91ae-364da2661108https://weechat.org/doc/security/

Patch Availability(1)

Vendor / Ecosystem	Fixed in / Patch	Released	Source
ubuntu	weechat (1.4-2ubuntu0.1+esm1) @ xenial	2026-05-27	ubuntu

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.

Weakness Classification(1)

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

CWE-120Buffer Copy without Checking Size (Classic Buffer Overflow)

All Vendor Advisories

(1)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

UbuntuUSN-5258-1MEDIUM
WeeChat vulnerabilities

Data Freshness Timeline

(refreshed 9× in last 7d / 9× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

2026-05-27 13:39 UTCepss_batch
2026-05-27 13:39 UTCepss_batch
2026-05-27 06:06 UTCEG score recompute
2026-05-27 06:06 UTCVendor advisory
2026-05-27 06:06 UTCGHSA enrichment
2026-05-26 13:42 UTCepss_batch
2026-05-26 13:42 UTCepss_batch
2026-05-26 07:17 UTCepss_batch
2026-05-26 07:17 UTCepss_batch

Frequently asked(5)

What is CVE-2020-9760?

CVE-2020-9760 is a critical vulnerability published on March 23, 2020. An issue was discovered in WeeChat before 2.7.1 (0.3.4 to 2.7 are affected). When a new IRC message 005 is received with longer nick prefixes, a buffer overflow and possibly a crash can happen when a new mode is set for a nick.

When was CVE-2020-9760 disclosed?

CVE-2020-9760 was first published in the National Vulnerability Database on March 23, 2020, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2020-9760 actively exploited?

CVE-2020-9760 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 77.8% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2020-9760?

CVE-2020-9760 has a CVSS v3 base score of 9.8 (NVD).

How do I remediate CVE-2020-9760?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2020-9760, 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.

Dependency Blast Radius

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CVE-2020-9760

Published

Last Modified

References (10)

Patch Availability(1)

Weakness Classification(1)

All Vendor Advisories

Data Freshness Timeline

Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2020-9760?

Same vendor

Same CWE

CVE-2020-9760

📅 Published

🔄 Last Modified

🔗 References (10)

Patch Availability(1)

Weakness Classification(1)

All Vendor Advisories

Data Freshness Timeline

❓ Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2020-9760?

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References (10)

Frequently asked(5)

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