[NEW] [medium] GNU Emacs: Vulnerability allows information disclosure and DoS

mediumCVE-2026-77219

A remote, anonymous attacker can exploit a vulnerability in GNU Emacs to disclose information or cause denial-of-service conditions.

CSIRTS triage

vendor: GNU product: Emacs Information disclosure Denial of service

What: Remote attacker can disclose information or cause denial of service in GNU Emacs.
Who is affected: Remote users connecting to systems running vulnerable Emacs instances.
Urgency: Medium; remote exploitation possible but no active attacks reported.
Action: Update GNU Emacs to patched version addressing CVE-2026-77219.

AI-assisted analysis generated from the source advisory — verify against the original.

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Details

Source: CERT-Bund (BSI) Security Advisories (DE · national-cert · site)
Severity: medium
Published: 2026-08-24
Exploitation: Not in CISA KEV at last sync
Language: Machine-translated to English — verify against the original

Original advisory: https://wid.cert-bund.de/portal/wid/securityadvisory?name=WID-SEC-2026-2976

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Low exploitation riskCVE-2026-772190.13% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 3% of all EPSS-scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-77219	coverage & exploitation status	NVD · CVE.org

Same CVEs, other sources

How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.

Recent advisories for GNU Emacs

A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.

highCVE-2026-77219: GNU Emacs before 31.0.91 contains an integer overflow in the PBM/PPM/PGM image loader that all…nvd · 2026-08-21
medium[NEW] [medium] GNU Emacs: Multiple vulnerabilitiescert-bund · 2026-08-11
highCVE-2026-77219: GNU Emacs < 31.0.91 Heap Over-Read via PBM/PPM/PGM Image Loadermsrc · 2026-08-11
unknownCVE-2026-71394: GNU Emacs for Android improperly validates the table header input in sfnt_read_table_directory…nvd · 2026-08-10
unknownCVE-2026-71393: GNU Emacs for Android is vulnerable to an integer overflow in sfnt_read_name_table() in src/sf…nvd · 2026-08-10
unknownCVE-2026-71392: GNU Emacs for Android is vulnerable to an integer overflow in the sfnt_read_cmap_format_12() f…nvd · 2026-08-10