PCRE2 before 10.48 allows a pcre2_dfa_match out-of-bounds write because reuse of a cached workspace block, in a recursive DFA matching workspace, lacks a size check (even though a newly allocated block, for the same purpose, does have a size check). This outcome requires an attacker-controlled regular expression, or a recursive pattern in conjunction with a small heap limit (this can be set through the API).
CVE-2026-86145
“—” beside the score: it is equal to the CVSS score beside it.
Score 8.2 from GitHub Security Advisory (severity: HIGH) published 2026-09-05. A secondary CVSS source baseline 8.2; sources differ by 0.0.
Also known asEUVD-2026-71836 (ENISA EUVD) · GHSA-hmq6-c24m-v98g (GitHub Security Advisories)Source: ENISA EUVD
- High severity, but no confirmed exploitation yet
A fix is available — apply it.
- CVSS v3
- 8.2
- EG Score
- 8.2HIGHmedium confidence
- EG Risk
- 52EG Risk 52/100
EG Risk is EchelonGraph's 0–100 priority score. It fuses impact severity (EG Severity, the CVSS base score, never the KEV-floored or EPSS-lifted EG Score) with real-world exploitation and automatability, under weights EchelonGraph set by hand, so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner.
How it’s computed (value × EchelonGraph’s weight)Severity82% × 45%Impact severity (EG Severity): CVSS 8.2 of 10. Never the KEV-floored or EPSS-lifted EG Score.Exploitation0.4% × 40%FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.Automatability100% × 15%CISA's SSVC Automatable value: yes (Vulnrichment).SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Attend at high (mission-essential systems).Exploitation none (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.Action: A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high. - EPSS PROB
- 0.4%
- EPSS %ILE
- 36th
- KEV
- Not listed
What the EG score is made of (scorer v4.0: the three questions the 0–10 score mixes, published apart · methodology)
The EG score (8.2): severity, escalated by confirmed exploitation. This CVE's 8.2 is its impact severity (EG Severity), not escalated.
- EG Severity
- 8.2 HIGHCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.GitHub Security Advisory CVSS
- EG Likelihood
- 0.4% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-10-27). FIRST's exploitation probability, not an EchelonGraph model.
- Confirmed exploitation
- None on record (CISA KEV, EG-KEV Tier 1)Reported apart from the likelihood: an observed fact, not a probability.
- EG Priority
- SSVC Track at medium mission impactTrack at low or medium mission impact; Attend at high (mission-essential systems).CISA BOD 26-04: 14 days if the affected system is publicly exposed; 60 days if it is not.Each input and its source, and whom BOD 26-04 binds: the SSVC and BOD 26-04 blocks below.
SSVC (CISA's decision table, applied by EchelonGraph)Track at low or medium mission impact; Attend at high (mission-essential systems).
A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.
Exploitation none (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table
BOD 26-04 (CISA's remediation timeline, Table 1)14 days if the affected system is publicly exposed; 60 days if it is not.
The score's inputs: In CISA KEV no (CISA's KEV catalog) · Automatable yes (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it
Published
September 5, 2026
Last Modified
September 9, 2026
Advisory Details (2)
Auto-updated Sep 5, 2026PCRE2 10.48
Patch available: PCRE2Project/pcre2 pcre2-10.48
https://github.com/PCRE2Project/pcre2/releases/tag/pcre2-10.48PCRE2: out-of-bounds write in pcre2_dfa_match() with recursive patterns under a low heap limit · Advisory · PCRE2Project/pcre2 · GitHub
Affected: 10.48
https://github.com/PCRE2Project/pcre2/security/advisories/GHSA-3r4p-g7gg-ppmfVendor Advisories for CVE-2026-86145(20)
These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.
- RHSA-2026:92899Red Hat Product SecurityHigh
Red Hat Security Advisory: pcre2 security update
- RHSA-2026:92901Red Hat Product SecurityHigh
Red Hat Security Advisory: pcre2 security update
- RHSA-2026:89197Red Hat Product SecurityCritical
Red Hat Security Advisory: OpenShift Container Platform 4.22.20 bug fix and security update
- RHSA-2026:91249Red Hat Product SecurityCritical
Red Hat Security Advisory: Red Hat AI Base Images 3.5.5 (Neuron)
- RHSA-2026:91248Red Hat Product SecurityCritical
Red Hat Security Advisory: Red Hat AI Base Images 3.4.6 (Neuron)
- RHSA-2026:91246Red Hat Product SecurityCritical
Red Hat Security Advisory: Red Hat AI Base Images 3.5.5 (ROCm 7.14)
- RHSA-2026:91245Red Hat Product SecurityCritical
Red Hat Security Advisory: Red Hat AI Base Images 3.4.6 (Spyre)
- RHSA-2026:91244Red Hat Product SecurityCritical
Red Hat Security Advisory: Red Hat AI Base Images 3.4.6 (ROCm 6.4)
- +12 more
Patch Availability(11)
| Vendor / Ecosystem | Fix (by version range) / Patch | Released | Source |
|---|---|---|---|
| redhat | pcre2-0:10.44-1.4.el10_0 | 2026-10-20 | redhat |
| redhat | pcre2-0:10.32-3.el8_8.2 | 2026-10-20 | redhat |
| redhat | mariadb11.8-3:11.8.8-2.el10_2 | 2026-10-19 | redhat |
| redhat | pcre2-0:10.40-5.el9_4.1 | 2026-10-14 | redhat |
| redhat | pcre2-0:10.40-2.el9_2.1 | 2026-10-14 | redhat |
| redhat | rhui5/rhua-rhel9:1791978693 | 2026-10-14 | redhat |
| redhat | pcre2-0:10.40-6.el9_6.1 | 2026-10-14 | redhat |
| redhat | pcre2-0:10.32-4.el8_10 | 2026-10-13 | redhat |
| redhat | pcre2-0:10.40-7.el9_8 | 2026-10-12 | redhat |
| redhat | pcre2-0:10.44-1.5.el10_2 | 2026-10-12 | redhat |
| redhat | pcre2-main-10.48-0.1.hum1 | 2026-09-15 | redhat |
Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.
Affected Packages
(5 across 5 ecosystems)
Alpine:v3.23(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| pcre2 | — |
| — |
Alpine:v3.24(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| pcre2 | — |
| — |
Debian:12(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| pcre2 | 10.42-1 |
| — |
Debian:13(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| pcre2 | 10.45-1, 10.46-1~deb13u1 |
| — |
Debian:14(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| pcre2 | 10.45-1 ... 10.47-2 (7 versions) |
| — |
Weakness Classification(1)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
All Vendor Advisories
(12)
Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.
- Microsoft MSRCCVE-2026-861452026-09-06
PCRE2 before 10.48 allows a pcre2_dfa_match out-of-bounds write because reuse of a cached workspace block, in a recursive DFA matching workspace, lacks a size check (even though a newly allocated block, for the same purpose, does have a size check). This outcome requires an attacker-controlled regular expression, or a recursive pattern in conjunction with a small heap limit (this can be set through the API).
- Red HatRHSA-2026:67534IMPORTANT2026-09-05
RHSA-2026:67534 — Important
- Red HatRHSA-2026:81522IMPORTANT2026-09-05
RHSA-2026:81522 — Important
- Red HatRHSA-2026:81532IMPORTANT2026-09-05
RHSA-2026:81532 — Important
- Red HatRHSA-2026:81613IMPORTANT2026-09-05
RHSA-2026:81613 — Important
- Red HatRHSA-2026:82845IMPORTANT2026-09-05
RHSA-2026:82845 — Important
- Red HatRHSA-2026:82875IMPORTANT2026-09-05
RHSA-2026:82875 — Important
- Red HatRHSA-2026:82876IMPORTANT2026-09-05
RHSA-2026:82876 — Important
- Red HatRHSA-2026:82939IMPORTANT2026-09-05
RHSA-2026:82939 — Important
- Red HatRHSA-2026:84799IMPORTANT2026-09-05
RHSA-2026:84799 — Important
- Red HatRHSA-2026:86205IMPORTANT2026-09-05
RHSA-2026:86205 — Important
- Red HatRHSA-2026:86206IMPORTANT2026-09-05
RHSA-2026:86206 — Important
Data Freshness Timeline
(refreshed 10× in last 7d / 74× in last 30d)
Each row is a time one of our pipelines fetched, updated or re-scored this CVE. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.
Showing the most recent 98 of 228 refreshes on record for this CVE.
A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. 2 repeat rows among the latest 100 are merged into the row they repeat. The 130 oldest rows on record are not shown and were not checked, so the counts can still include repeats.
- 2026-11-01 16:35 UTCEPSS rescoreEPSS 0.4% · 36th percentile
- 2026-10-31 16:33 UTCEPSS rescoreEPSS 0.4% · 36th percentile
- 2026-10-30 16:35 UTCEPSS rescoreEPSS 0.4% · 36th percentile
- 2026-10-29 16:34 UTCEPSS rescoreEPSS 0.4% · 36th percentile
- 2026-10-28 16:33 UTCEPSS rescoreEPSS 0.4% · 36th percentile
- 2026-10-27 20:02 UTCEG score recompute
- 2026-10-27 20:02 UTCVendor advisory
- 2026-10-27 20:02 UTCGHSA enrichmentGHSA-hmq6-c24m-v98g · GitHub severity HIGH · GitHub CVSS 8.2
- 2026-10-27 16:32 UTCEPSS rescoreEPSS 0.4% · 36th percentile
- 2026-10-26 16:32 UTCEPSS rescoreEPSS 0.4% · 36th percentile
- 2026-10-25 16:34 UTCEPSS rescoreEPSS 0.4% · 36th percentile
- 2026-10-25 13:55 UTCEG score recompute
- 2026-10-24 16:33 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
- 2026-10-23 16:32 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
- 2026-10-22 16:35 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
- 2026-10-21 16:34 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
- 2026-10-20 16:33 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
- 2026-10-20 07:29 UTCEG score recompute
- 2026-10-20 07:29 UTCVendor advisory
- 2026-10-20 07:29 UTCGHSA enrichmentGHSA-hmq6-c24m-v98g · GitHub severity HIGH · GitHub CVSS 8.2
- 2026-10-19 16:33 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
- 2026-10-18 16:33 UTCEPSS rescoreEPSS 0.4% · 31st percentile
- 2026-10-18 03:05 UTCEG score recompute
- 2026-10-17 16:35 UTCEPSS rescoreEPSS 0.4% · 31st percentile
- 2026-10-16 16:44 UTCEPSS rescoreEPSS 0.4% · 31st percentile
Show 73 moreShow fewer
- 2026-10-15 16:33 UTCEPSS rescoreEPSS 0.4% · 31st percentile
- 2026-10-14 16:34 UTCEPSS rescoreEPSS 0.4% · 31st percentile
- 2026-10-13 16:35 UTCEPSS rescoreEPSS 0.4% · 31st percentile
- 2026-10-13 05:22 UTCEG score recompute
- 2026-10-13 05:22 UTCVendor advisory
- 2026-10-13 05:22 UTCGHSA enrichmentGHSA-hmq6-c24m-v98g · GitHub severity HIGH · GitHub CVSS 8.2
- 2026-10-12 16:35 UTCEPSS rescoreEPSS 0.4% · 31st percentile
- 2026-10-12 14:51 UTCEG score recompute
- 2026-10-11 19:17 UTCEG score recompute
- 2026-10-11 16:34 UTCEG score recompute
- 2026-10-11 13:51 UTCEG score recompute
- 2026-10-11 13:49 UTCEPSS rescoreEPSS 0.4% · 31st percentile
- 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.4% · 31st percentile
- 2026-10-10 11:23 UTCVendor advisory
- 2026-10-10 11:23 UTCGHSA enrichmentGHSA-hmq6-c24m-v98g · GitHub severity HIGH · GitHub CVSS 8.2
- 2026-10-09 23:04 UTCEG score recompute
- 2026-10-09 23:04 UTCVendor advisory
- 2026-10-09 23:04 UTCGHSA enrichmentGHSA-hmq6-c24m-v98g · GitHub severity HIGH · GitHub CVSS 8.2
- 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.4% · 31st percentile
- 2026-10-09 01:05 UTCEG score recompute
- 2026-10-09 01:05 UTCVendor advisory
- 2026-10-09 01:05 UTCGHSA enrichmentGHSA-hmq6-c24m-v98g · GitHub severity HIGH · GitHub CVSS 8.2
- 2026-10-08 17:13 UTCEPSS rescoreEPSS 0.4% · 31st percentile
- 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.4% · 31st percentile
- 2026-10-07 22:58 UTCVendor advisory
- 2026-10-07 22:58 UTCGHSA enrichmentGHSA-hmq6-c24m-v98g · GitHub severity HIGH · GitHub CVSS 8.2
- 2026-10-07 09:26 UTCVendor advisory
- 2026-10-07 09:26 UTCGHSA enrichmentGHSA-hmq6-c24m-v98g · GitHub severity HIGH · GitHub CVSS 8.2
- 2026-10-06 21:09 UTCEG score recompute
- 2026-10-06 21:09 UTCVendor advisory
- 2026-10-06 21:09 UTCGHSA enrichmentGHSA-hmq6-c24m-v98g · GitHub severity HIGH · GitHub CVSS 8.2
- 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.4% · 31st percentile
- 2026-10-06 08:47 UTCVendor advisory
- 2026-10-06 08:47 UTCGHSA enrichmentGHSA-hmq6-c24m-v98g · GitHub severity HIGH · GitHub CVSS 8.2
- 2026-10-05 20:28 UTCEG score recompute
- 2026-10-05 20:28 UTCVendor advisory
- 2026-10-05 20:28 UTCGHSA enrichmentGHSA-hmq6-c24m-v98g · GitHub severity HIGH · GitHub CVSS 8.2
- 2026-10-05 17:44 UTCEPSS rescoreEPSS 0.4% · 31st percentile
- 2026-10-05 08:04 UTCEG score recompute
- 2026-10-05 08:04 UTCVendor advisory
- 2026-10-05 08:04 UTCGHSA enrichmentGHSA-hmq6-c24m-v98g · GitHub severity HIGH · GitHub CVSS 8.2
- 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.4% · 31st percentile
- 2026-10-04 19:47 UTCVendor advisory
- 2026-10-04 19:47 UTCGHSA enrichmentGHSA-hmq6-c24m-v98g · GitHub severity HIGH · GitHub CVSS 8.2
- 2026-10-04 07:30 UTCVendor advisory
- 2026-10-04 07:30 UTCGHSA enrichmentGHSA-hmq6-c24m-v98g · GitHub severity HIGH · GitHub CVSS 8.2
- 2026-10-03 19:14 UTCEG score recompute
- 2026-10-03 19:14 UTCVendor advisory
- 2026-10-03 19:14 UTCGHSA enrichmentGHSA-hmq6-c24m-v98g · GitHub severity HIGH · GitHub CVSS 8.2
- 2026-10-03 06:36 UTCVendor advisory
- 2026-10-03 06:36 UTCGHSA enrichmentGHSA-hmq6-c24m-v98g · GitHub severity HIGH · GitHub CVSS 8.2
- 2026-10-02 18:19 UTCEG score recompute
- 2026-10-02 18:19 UTCVendor advisory
- 2026-10-02 18:19 UTCGHSA enrichmentGHSA-hmq6-c24m-v98g · GitHub severity HIGH · GitHub CVSS 8.2
- 2026-10-02 17:57 UTCEPSS rescoreEPSS 0.4% · 31st percentile
- 2026-10-02 05:59 UTCEG score recompute
- 2026-10-02 05:59 UTCVendor advisory
- 2026-10-02 05:59 UTCGHSA enrichmentGHSA-hmq6-c24m-v98g · GitHub severity HIGH · GitHub CVSS 8.2
- 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.4% · 31st percentile
- 2026-10-01 16:00 UTCVendor advisory
- 2026-10-01 15:59 UTCGHSA enrichmentGHSA-hmq6-c24m-v98g · GitHub severity HIGH · GitHub CVSS 8.2
- 2026-10-01 03:42 UTCVendor advisory
- 2026-10-01 03:42 UTCGHSA enrichmentGHSA-hmq6-c24m-v98g · GitHub severity HIGH · GitHub CVSS 8.2
- 2026-09-30 15:25 UTCEG score recompute
- 2026-09-30 15:25 UTCVendor advisory
- 2026-09-30 15:25 UTCGHSA enrichmentGHSA-hmq6-c24m-v98g · GitHub severity HIGH · GitHub CVSS 8.2
- 2026-09-30 15:04 UTCEPSS rescoreEPSS 0.4% · 31st percentile
- 2026-09-30 02:38 UTCEG score recompute
- 2026-09-30 02:38 UTCVendor advisory
- 2026-09-30 02:38 UTCGHSA enrichmentGHSA-hmq6-c24m-v98g · GitHub severity HIGH · GitHub CVSS 8.2
- 2026-09-29 07:24 UTCEG score recompute
- 2026-09-29 07:24 UTCVendor advisory
- 2026-09-29 07:24 UTCGHSA enrichmentGHSA-hmq6-c24m-v98g · GitHub severity HIGH · GitHub CVSS 8.2
Related CVEs(same product + same vendor + same CWE)
Same product
10 shownAlpine:v3.23:pcre2
Same vendor
10 shownredhat:RHSA-2026:81522 · redhat:RHSA-2026:67534 · redhat:RHSA-2026:82939
Frequently asked(5)
What is CVE-2026-86145?
When was the CVE record for CVE-2026-86145 published?
Is CVE-2026-86145 actively exploited?
What is the CVSS score of CVE-2026-86145?
How do I remediate CVE-2026-86145?
Dependency Blast Radius
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