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Public proof of conceptFix available

CVE-2026-89157

A public proof of concept exists; no exploitation attested.

  • Published2026-09-11
  • Fixed in10.48
  • WeaknessCWE-190

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

PCRE2 before 10.48, on 32-bit platforms, has a pcre2_pattern_convert out-of-bounds write when an attacker can provide a large pattern.

Timeline

dates in UTC
  1. 2026-09-1104:18CVE publishedNVD

Versions per branch

NVD
Pcre pcre2
BranchAffectedFixed in
10.x≥ 10.30, < 10.4810.48
10.48= 10.48no fix published

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

  • nmapAzure Linux:3all versions · fixed in 7.95-6
  • pcre2Ubuntu:Pro:20.04:LTSall versions · fixed in 10.34-7ubuntu0.1+esm1
  • pcre2Ubuntu:Pro:18.04:LTSall versions · fixed in 10.31-2ubuntu0.1~esm2
  • pcre2Ubuntu:Pro:16.04:LTSall versions · fixed in 10.21-1ubuntu0.1~esm1
  • pcre2Ubuntu:26.10all versions · fixed in 10.46-1ubuntu1
  • pcre2Ubuntu:26.04:LTSall versions · fixed in 10.46-1ubuntu0.1
  • pcre2Ubuntu:24.04:LTSall versions · fixed in 10.42-4ubuntu2.2
  • pcre2Ubuntu:22.04:LTSall versions · fixed in 10.39-3ubuntu0.2

59 more package ranges on OSV.dev

Vendor advisories

  • CVE-2026-89157 Red Hat Product Security273 products fixed · 92 known affected

    pcre2: PCRE2: Out-of-bounds write via large pattern input

    mariadb as a component of Red Hat Enterprise Linux 10 · mariadb-backup as a component of Red Hat Enterprise Linux 10 · mariadb-client-utils as a component of Red Hat Enterprise Linux 10 · +89 more

  • RHSA-2026:87400 Red Hat Product Security1 product fixed

    Red Hat Security Advisory: Red Hat Cost Management On-Premise container image update

  • RHSA-2026:82939 Red Hat Product Security5 products fixed

    Red Hat Security Advisory: Red Hat Update Infrastructure 5.3 security update

  • RHSA-2026:81613 Red Hat Product Security70 products fixed

    Red Hat Security Advisory: pcre2 security update

  • RHSA-2026:81532 Red Hat Product Security96 products fixed

    Red Hat Security Advisory: pcre2 security update

  • RHSA-2026:81522 Red Hat Product Security86 products fixed

    Red Hat Security Advisory: pcre2 security update

1 more advisory

Full record on NVD

Fix

  1. Update Pcre pcre2 to 10.48
  2. Vendor fix Red Hat Product Security RHSA-2026:87400 · 1 productThe container image provided by this update can be downloaded from the Red Hat container registry at registry.redhat.io using the "podman pull" command.
  3. Vendor fix Red Hat Product Security RHSA-2026:82939 · 5 productsThe container images provided by this release, apart from the installer, should be deployed using rhui-installer utility. See the official documentation for more details.
  4. Vendor fix Red Hat Product Security RHSA-2026:81613 · 70 productsFor details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258
  5. Vendor fix Red Hat Product Security RHSA-2026:67534 · 15 productsFor details on how to apply this update, which includes the changes described in this advisory, refer to: https://images.redhat.com/
  6. Workaround from the vendor Red Hat Product Security RHSA-2026:87400 · 1 productMitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.
  7. No fix available, says the vendor Red Hat Product Security CVE-2026-89157 · 92 productsFix deferred

Advisories and patches

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof of concept
Metasploit modules
none listed
Metasploit Framework

Sources

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:H
Published
2026-09-11
Last Modified
2026-09-16
NVD status
Analyzed
GitHub Advisory
GHSA-797w-fgfq-r75v

Frequently asked questions

What is CVE-2026-89157?

PCRE2 before 10.48, on 32-bit platforms, has a pcre2_pattern_convert out-of-bounds write when an attacker can provide a large pattern.

Is CVE-2026-89157 actively exploited?

A proof-of-concept exploit exists for CVE-2026-89157, but active exploitation has not been confirmed at this time.

What is the CVSS score for CVE-2026-89157?

CVE-2026-89157 has a CVSS v3 base score of 7.4 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:H.

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