Skip to content
Fencer Vulns
low 2.9

CVE-2026-89162 json

In PCRE2 before 10.48, pcre2_serialize_encode might disclose two bytes to an adversary, typically in a situation where the access available…

published 2026-09-11 59 d ago modified 2026-09-16 53 d ago also EUVD-2026-75947

cvss
2.9
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.2%
EPSS 0.2% chance of exploitation in 30 days, percentile 4%
public exploits
0
none known

Summary

In PCRE2 before 10.48, pcre2_serialize_encode might disclose two bytes to an adversary, typically in a situation where the access available to the adversary is already unsafe.

Patch / fix

  • PCRE PCRE2 10.48
  • pcre2 Debian 13 10.46-1~deb13u2
  • pcre2 Debian 14 10.48-1

debian advisories DEBIAN-CVE-2026-89162

  • pcre2 Ubuntu 26.10 10.46-1ubuntu1
  • pcre2 Ubuntu 26.04 LTS 10.46-1ubuntu0.1

ubuntu advisories UBUNTU-CVE-2026-89162

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • pcre2 hummingbird 1 10.48-0.1.hum1
  • pcre2-tools hummingbird 1 10.48-0.1.hum1
  • pcre2-utf16 hummingbird 1 10.48-0.1.hum1
  • pcre2-utf32 hummingbird 1 10.48-0.1.hum1
  • pcre2-syntax hummingbird 1 10.48-0.1.hum1

red hat advisories RHSA-2026:67534

  • pcre2 SLES 16.0, Linux Micro 6.2, SLES for SAP applications 16.0 10.45-160000.4.1

suse advisories SUSE-SU-2026:23891-1SUSE-SU-2026:23906-1

  • pcre2 openSUSE Leap 16.0 10.45-160000.4.1

opensuse advisories openSUSE-SU-2026:21938-1

  • pcre2 Alpine 3.22 10.46-r1
  • pcre2 Alpine 3.24, Alpine 3.23 10.48-r0

alpine advisories ALPINE-CVE-2026-89162

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

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-2026-89162 updated cvss 2.9

pcre2: PCRE2: Information disclosure via pcre2_serialize_encode

  • Red Hat Enterprise Linux 8 Judy, galera, mariadb, mariadb-pam, mariadb-test, mariadb-backup, +8 more Red Hat Enterprise Linux 9 mariadb, mariadb-pam, mariadb-test, mariadb-backup, mariadb-common, mariadb-errmsg, +6 more Red Hat Enterprise Linux 10 mariadb11.8, mariadb10.11
    affected: workaround, no fix available “Fix deferred”
  • Red Hat Hardened Images pcre2 10.48-0.1.hum1, pcre2-tools 10.48-0.1.hum1, pcre2-utf16 10.48-0.1.hum1, pcre2-utf32 10.48-0.1.hum1, pcre2-syntax 10.48-0.1.hum1
    fixed: vendor fix RHSA-2026:67534
  • Red Hat Enterprise Linux 7 pcre2, pcre2-tools, pcre2-utf16, pcre2-utf32 Red Hat Enterprise Linux 8 pcre2, pcre2-tools, pcre2-utf16, pcre2-utf32 Red Hat Enterprise Linux 9 bootc, pcre2, pcre2-tools, pcre2-utf16, pcre2-utf32, pcre2-syntax, +3 more Red Hat Enterprise Linux 10 bootc, pcre2, mingw-pcre2, mingw32-pcre2, mingw64-pcre2 Red Hat Hardened Images rust Red Hat OpenShift Container Platform 4 openshift/ose-rhel-coreos-8, openshift/ose-rhel-coreos-9
    +1 more products
    Red Hat OpenShift Container Platform 5 openshift/ose-rhel-coreos-9
    not affected: vulnerable code not present

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
55 d ago

Exploit prediction

0.16% chance of exploitation in the next 30 days, higher than 4% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • github.com https://github.com/PCRE2Project/pcre2/security/advisories/GHSA-q7rw-r7qq-2hx6 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CNA 3.1 2.9 CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N
NVD 3.1 3.3 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

Affected products

  • PCRE PCRE2

Classification

Weakness
  • CWE-669 Incorrect Resource Transfer Between Spheres

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.