CVE-2017-8786

Exp

pcre2test.c in PCRE2 10.23 allows remote attackers to cause a denial of service (heap-based buffer overflow) or possibly have unspecified other impact via a crafted regular expression.

Published: 2017-05-05 Last update: 2026-05-13 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2017-8786 is rated High Exploit Risk (78.2/100): CVSS Critical severity, with medium exploitation likelihood (EPSS 0.67%). 2 public exploit reference(s) are indexed (Exploit-DB). Public exploits are available—assess exposure, apply mitigations, and prioritize patching.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Public exploit references (Exploit-DB) for CVE-2017-8786

EDB-ID Source Kind Published Link
— nvd_ref exploit_tag Exploit-DB ↗
— nvd_ref exploit_tag Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2017-8786

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2025-11-21 1.38% 0.67% -0.71%
2 2025-11-18 0.70% 1.38% +0.68%
3 2025-07-12 — 0.70% —

Full EPSS history (9 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2017-8786

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
9.8 3.0 CRITICAL
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 3.9 5.9 [email protected]
7.5 2.0 HIGH
AV:N/AC:L/Au:N/C:P/I:P/A:P Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:P)
Partial confidentiality impact.
Integrity impact (I:P)
Partial integrity impact.
Availability impact (A:P)
Partial availability impact.
 10.0 6.4 [email protected]

Weakness enumeration for CVE-2017-8786

OS Trackers for CVE-2017-8786

vendor priority summary link
debian unimportant CVE-2017-8786 unimportant priority: Debian including 1 source packages (pcre2), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2017-8786
gentoo normal CVE-2017-8786: 1 GLSA(s) (201710-09), 1 atom(s) (dev-libs/libpcre2); latest impact normal. https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2017-8786
redhat low — https://access.redhat.com/security/cve/CVE-2017-8786
suse low CVE-2017-8786 severity low: SUSE including 295 source package names (amazon/suse-sles-15-sp1-chost-byos-v20210304-hvm-ssd-x86_64, amazon/suse-sles-15-sp1-chost-byos-v20220127-hvm-ssd-x86_64, …), 591 product×package rows across 77 product lines (HPE Helion OpenStack 8, SUSE CaaS Platform 4.0, … (77 product lines)): Known Not Affected 281, Known Affected 157, Fixed 153. https://www.suse.com/security/cve/CVE-2017-8786/
ubuntu negligible CVE-2017-8786 negligible priority: Ubuntu including 1 source packages (pcre2), 23 status rows across 23 suites (artful, bionic, cosmic, disco, eoan, focal, groovy, hirsute, impish, jammy, kinetic, lunar, mantic, noble, oracular, plucky, precise, questing, trusty, upstream, xenial, yakkety, zesty): not-affected 16, ignored 3, DNE 2, needed 1, released 1. https://ubuntu.com/security/CVE-2017-8786

Affected software / configurations for CVE-2017-8786

Vendor Product Version Raw CPE
pcre pcre2 10.23 cpe:2.3:a:pcre:pcre2:10.23:*:*:*:*:*:*:*

References for CVE-2017-8786

cvelogic Threat Intelligence