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Fencer Vulns
medium 5.5

CVE-2026-115207 json

Patch: filename validation bypass in reversal fallback allows file creation outside the working directory

published 2026-10-22 18 d ago modified 2026-11-09 28 min ago also EUVD-2026-108112

cvss
5.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.1%
EPSS 0.1% chance of exploitation in 30 days, percentile 3%
public exploits
0
none known

Summary

A flaw was found in GNU patch. An attacker can achieve arbitrary file creation outside the intended working directory by enticing a user or automated workflow to apply a specially crafted patch file. Due to missing validation during automatic patch reversal, absolute file paths in patch headers are accepted rather than rejected. Consequently, the utility can create files in arbitrary locations with the permissions of the executing user.

Patch / fix

  • Red Hat Red Hat Enterprise Linux 8 0:2.7.6-12.el8_10
  • patch Debian 14 2.8.1-1

debian advisories DEBIAN-CVE-2026-115207

  • patch openSUSE Tumbleweed 2.8.1-1.1

opensuse advisories openSUSE-SU-2026:12302-1

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-115207 updated cvss 5.5

patch: Filename validation bypass in reversal fallback allows file creation outside the working directory

  • Red Hat Enterprise Linux 6 patch
    affected: workaround, no fix planned “Out of support scope”
  • Red Hat Enterprise Linux 7 patch
    affected: workaround, no fix available “Fix deferred”
  • Red Hat Enterprise Linux 9 patch Red Hat Enterprise Linux 10 patch Red Hat Hardened Images patch
    affected: workaround, no fix available
  • Red Hat Enterprise Linux BaseOS (v. 8) patch 2.7.6-12.el8_10
    fixed: vendor fix RHSA-2026:96215

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
12 d ago

Exploit prediction

0.14% chance of exploitation in the next 30 days, higher than 3% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 5.5 CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N

Affected products

  • Red Hat Red Hat Enterprise Linux 8
  • Red Hat Red Hat Enterprise Linux 10
  • Red Hat Red Hat Enterprise Linux 6
  • Red Hat Red Hat Enterprise Linux 7
  • Red Hat Red Hat Enterprise Linux 9
  • Red Hat Red Hat Hardened Images

Classification

Weakness
  • CWE-22 Improper Limitation of a Pathname to a Restricted Directory

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.