CVE-2026-89161: pcre pcre2 Free of Memory not on the Heap
CVSS: 7.8v3.1HighUndergoing analysis
AliasesALPINE-CVE-2026-89161UBUNTU-CVE-2026-89161DEBIAN-CVE-2026-89161
Published 11-09-2026Last modified 11-09-2026
Vulnerability summary
CVE-2026-89161 is a high (CVSS 7.8) Free of Memory not on the Heap vulnerability in pcre pcre2. EPSS estimates a 0.13% chance of exploitation in the next 30 days, higher than 2.1% of scored vulnerabilities.
CVSS score
7.8/10
010
High · v3.1 (NVD)EPSS score
0.13%
0%100%
Low · +0.01 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded
Advisory lineage
Upstream 0 · Downstream 15 · Related 8Timeline
- 11-09-2026PublishedVulnerability first disclosed.
- 11-09-2026Last modifiedVulnerability information updated.
Description
In PCRE2 before 10.48, pcre2_jit_match mishandles a previously copied subject being passed in as a context. An incorrect free operation can occur.
CVSS metrics
5 scores · 5 sources · 1 versionHigh 7.8Preferred score · NVD (NIST)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HSources5 sources · 7.4–7.8
- CVE.orgCNA7.4HighCVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:HDiffers
- OSV · AlpineEcosystem advisory · calculated7.8HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- OSV · UbuntuEcosystem advisory · calculated7.8HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- OSV · DebianEcosystem advisory · calculated7.8HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS trend
Probability
0.13%
Chance of exploitation in the next 30 days
Percentile
2%
Versus all other CVEs
30-day change
+0.01 pp
From 0.12% on 21-09-2026
21-09-202621-10-2026
EPSS score0.13%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Alpine1 product
- pcre2< 10.43-r1 | < 10.46-r1 | < 10.48-r0
Debian1 product
- pcre2< 10.42-1+deb12u1 | < 10.46-1~deb13u2 | < 10.48-1
Pcre1 product
- pcre2< 10.48 | 10.48:rc1
Ubuntu1 product
- pcre2All versions (No fix recorded)
4 vendors · 4 products
