CVE-2016-3191

CRITICALNVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2022-05-14. NVD baseline CVSS 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Trending — 3 sources updated this week
9.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 8%CVSS: 9.8Exploit: None knownExposed: 0

A fix is available — apply it.

The compile_branch function in pcre_compile.c in PCRE 8.x before 8.39 and pcre2_compile.c in PCRE2 before 10.22 mishandles patterns containing an (*ACCEPT) substring in conjunction with nested parentheses, which allows remote attackers to execute arbitrary code or cause a denial of service (stack-based buffer overflow) via a crafted regular expression, as demonstrated by a JavaScript RegExp object encountered by Konqueror, aka ZDI-CAN-3542.

CVSS v3
9.8
EG Score
9.8(medium)
EG Risk
52(Track)
EG Risk 52/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity98% × 45%
Exploitation8% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
8%
EPSS %ILE
94%
KEV
Not listed

Published

March 17, 2016

Last Modified

June 17, 2026

Advisory Details (5)

Auto-updated Jul 27, 2026
Patch available. Sources: redhat.
generic Patch Available

#815921 - pcre3: CVE-2016-3191: workspace overflow for (*ACCEPT) with deeply nested parentheses - Debian Bug report logs

https://bugs.debian.org/815921
generic Patch Available

#815920 - pcre2: CVE-2016-3191: workspace overflow for (*ACCEPT) with deeply nested parentheses - Debian Bug report logs

https://bugs.debian.org/815920
redhat Patch Available
https://access.redhat.com/errata/RHSA-2016:1132
generic
http://www.securityfocus.com/bid/84810
generic
http://rhn.redhat.com/errata/RHSA-2016-1025.html

Vendor Advisories for CVE-2016-3191(2)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Patch Availability(3)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntulibpcre3 (2:8.35-7.1ubuntu1.3) @ wily2026-05-20ubuntu
redhatrh-mariadb100-mariadb-1:10.0.25-4.el72016-05-26redhat
redhatpcre-0:8.32-15.el7_2.12016-05-11redhat

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.

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Additional Vendor Advisories

(1)

Vendors that published advisories for this CVE beyond the curated set above. Broader coverage but minimal per-row detail — click through for the original advisory.

Data Freshness Timeline

(refreshed 9× in last 7d / 38× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. 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. Most recent first.

Showing the most recent 100 of 116 total refreshes for this CVE.

  1. 2026-07-26 14:50 UTCEPSS rescore
  2. 2026-07-25 14:13 UTCEPSS rescore
  3. 2026-07-25 13:41 UTCOSV refresh
  4. 2026-07-23 14:14 UTCEPSS rescore
  5. 2026-07-23 01:22 UTCEG score recompute
  6. 2026-07-22 22:02 UTCEG score recompute
  7. 2026-07-22 14:04 UTCEPSS rescore
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  24. 2026-07-12 05:43 UTCEPSS rescore
  25. 2026-07-12 05:43 UTCEPSS rescore
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  1. 2026-07-11 08:23 UTCEPSS rescore
  2. 2026-07-09 19:05 UTCEPSS rescore
  3. 2026-07-08 15:10 UTCEPSS rescore
  4. 2026-07-08 08:27 UTCOSV refresh
  5. 2026-07-07 13:42 UTCEPSS rescore
  6. 2026-07-06 16:24 UTCEPSS rescore
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  8. 2026-07-05 02:27 UTCEPSS rescore
  9. 2026-07-04 06:28 UTCEPSS rescore
  10. 2026-07-01 15:02 UTCEPSS rescore
  11. 2026-06-30 23:19 UTCEPSS rescore
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  20. 2026-06-23 21:30 UTCEPSS rescore
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  23. 2026-06-21 01:57 UTCEPSS rescore
  24. 2026-06-21 01:57 UTCEPSS rescore
  25. 2026-06-19 20:23 UTCOSV refresh
  26. 2026-06-18 17:50 UTCEPSS rescore
  27. 2026-06-17 17:50 UTCEPSS rescore
  28. 2026-06-17 17:50 UTCEPSS rescore
  29. 2026-06-16 17:50 UTCEPSS rescore
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  31. 2026-06-15 17:45 UTCEPSS rescore
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  36. 2026-06-11 13:57 UTCEPSS rescore
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  39. 2026-06-07 15:22 UTCEPSS rescore
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  41. 2026-06-06 13:45 UTCEPSS rescore
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  45. 2026-06-04 13:10 UTCEPSS rescore
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  47. 2026-06-02 20:10 UTCEPSS rescore
  48. 2026-06-01 13:49 UTCEPSS rescore
  49. 2026-06-01 13:49 UTCEPSS rescore
  50. 2026-05-31 22:28 UTCEPSS rescore
  51. 2026-05-31 22:28 UTCEPSS rescore
  52. 2026-05-31 00:43 UTCOSV refresh
  53. 2026-05-31 00:14 UTCEPSS rescore
  54. 2026-05-29 13:41 UTCEPSS rescore
  55. 2026-05-28 13:42 UTCEPSS rescore
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  71. 2026-05-20 09:49 UTCVendor advisory
  72. 2026-05-20 09:49 UTCGHSA enrichment
  73. 2026-05-20 05:44 UTCVendor advisory
  74. 2026-05-20 05:44 UTCGHSA enrichment
  75. 2026-05-20 01:39 UTCVendor advisory

Related CVEs(same vendor + same CWE)

Frequently asked(5)

What is CVE-2016-3191?
CVE-2016-3191 is a critical vulnerability published on March 17, 2016. The compilebranch function in pcrecompile.c in PCRE 8.x before 8.39 and pcre2_compile.c in PCRE2 before 10.22 mishandles patterns containing an (*ACCEPT) substring in conjunction with nested parentheses, which allows remote attackers to execute arbitrary code or cause a denial of service…
When was CVE-2016-3191 disclosed?
CVE-2016-3191 was first published in the National Vulnerability Database on March 17, 2016, with the most recent update on June 17, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2016-3191 actively exploited?
CVE-2016-3191 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 8% probability of exploitation in the next 30 days, which ranks it in the top 5.6% of all scored CVEs.
What is the CVSS score of CVE-2016-3191?
CVE-2016-3191 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2016-3191?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2016-3191, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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