CVE-2026-78206Disclosure

LOWCVSS 8.7 · HIGH

Signal is active with 1 mentions in latest observed window

Immediate actions

Track advisory updates for patch or workaround availability

Recommended action window: Monitor and triage in normal cycle

NVD description

exceljs through 4.4.0 decompresses all entries from supplied xlsx archives into memory without limits on entry size, total size, or compression ratio. Attackers can upload highly compressed workbooks that expand to gigabytes in memory, exhausting available resources and causing denial of service.

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0.0/ 10 priority

Sources & remediation

Other references

Weakness type (CWE)

CWE-409

Priority

LOW

Exploitation

NONE

PoC

NONE

Patch

NONE

Momentum

NONE

Threat summary

1 mentions across 1 observed day

What's happening

Technical details provided in 1 signal
Disclosure: 1 classified signal
1 total mentions across 1 day

Deep dive

Activity timeline1 mentions / 1d

Signal classification1 categories

Disclosure

1100.0%

Referenced assets1 URL

By indicator

https://vulmon.com/vulnerabilitydetails?qid=CVE-2026-78206

Full discourse1 post

Vulmon Vulnerability Feed@VulmonFeeds46d
Disclosure
CVE-2026-78206 Denial of Service in exceljs-hardened Before 5.0.0 via Archive Resource Exhaustion https://vulmon.com/vulnerabilitydetails?qid=CVE-2026-78206
Post summary
The vulnerability CVE-2026-78206 is a DoS flaw in exceljs-hardened (version <5.0.0) caused by archive resource exhaustion, and no exploits, patches, or PoC details are mentioned.
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