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VulnerabilityCVE-2026-73055Published 2026-08-15

CVE-2026-73055 — ericcornelissen shescape

medium

As of 2026-08-15, CVE-2026-73055 is a MEDIUM-severity vulnerability in ericcornelissen shescape, CVSS v3.1 4.8, EPSS 0.2% (11.1th percentile). No Threadlinqs-tracked threat campaign has been attributed to CVE-2026-73055 as of 2026-08-15; the identifier is re-checked against the Threadlinqs threat corpus on every daily ingest.

CVSS v3.1
4.8/10Medium
EPSS
0.2%Higher than 11.1% of scored CVEs
CISA KEV
NoNot in the KEV catalog
Tracked threats
0None linked yet
Priority
2.8/10Threadlinqs triage score
Published
CVSS v3.1 4.8 (MEDIUM) · CVSS v4.0 9.3 · EPSS 0.2% (higher than 11.1% of all scored CVEs) · Priority 2.8/10 · Published 2026-08-15

Last updated:

What is CVE-2026-73055?

Shescape before 2.1.15 (and 3.0.0 before 3.0.2) fails to properly escape tilde (~) characters in assignment contexts on Unix systems where the shell is explicitly configured to "sh" or true and /bin/sh points to BusyBox. Using the escape and escapeAll APIs with untrusted input in an assignment prefixed to a command, an attacker can inject a tilde payload to disclose the user's home directory location and, depending on usage, alter the location on which a command operates.

The record classifies CVE-2026-73055 under weakness class CWE-116. Its CVSS v3 base vector states that the flaw is reachable remotely over the network, needs no prior authentication, needs no user interaction. 1 affected-product entry is recorded, across 1 vendor, listed below. The identifier was first published 51 days ago.

Severity and exploitation probability

CVSS v3.1 base score
4.8 — MEDIUM
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N
CVSS v4.0 base score
9.3
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
EPSS (FIRST)
0.2% probability of exploitation in the next 30 days, higher than 11.1% of all scored CVEs
CISA KEV
Not listed in the CISA Known Exploited Vulnerabilities catalog
Threadlinqs priority
2.8/10 — a Threadlinqs composite of the CVSS base score, the EPSS percentile and public exploit availability
Published
2026-08-15

Is CVE-2026-73055 being exploited?

It currently carries a trending score of 33 in the Threadlinqs vulnerability feed.

Affected products and versions

  • ericcornelissen: shescape

How to fix CVE-2026-73055

No vendor patch reference has been recorded for CVE-2026-73055 in the tracked sources. Follow the references below for a fix, and treat the products listed above as exposed until the vendor states otherwise.

Threat activity tracking CVE-2026-73055

No threat campaign in the Threadlinqs corpus currently references CVE-2026-73055, in its CVE list or as an indicator. The linkage is recomputed from the live corpus on every daily ingest, so this section fills in as soon as a tracked campaign cites the identifier.

Sources

Enriched from CVE.org, FIRST EPSS, GitHub Security Advisories. Last verified by Threadlinqs on .

Vendor advisory and patch

Third-party advisory