An attacker could construct a PKCS 12 cert bundle in such a way that could allow for arbitrary memory writes via PKCS 12 Safe Bag attributes being mishandled. This vulnerability affects Firefox < 110, Thunderbird < 102.8, and Firefox ESR < 102.8.
CVE-2023-0767
“—” beside the score: it is equal to NVD's CVSS score.
Score 8.8 from GitHub Security Advisory (severity: HIGH) published 2023-06-02. NVD baseline CVSS 8.8; sources differ by 0.0.
- High severity, but no confirmed exploitation yet
A fix is available — apply it.
- CVSS v3
- 8.8
- EG Score
- 8.8HIGHmedium confidence
- EG Risk
- 40EG Risk 40/100
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)Severity88% × 45%Impact severity (EG Severity): CVSS 8.8 of 10. Never the KEV-floored or EPSS-lifted EG Score.Exploitation0.8% × 40%FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.Automatability0% × 15%CISA's SSVC Automatable value: no (Vulnrichment).SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Track* at high (mission-essential systems).Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (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. - EPSS PROB
- 0.8%
- EPSS %ILE
- 56th
- 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 (8.8): severity, escalated by confirmed exploitation. This CVE's 8.8 is its impact severity (EG Severity), not escalated.
- EG Severity
- 8.8 HIGHCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.GitHub Security Advisory CVSS
- EG Likelihood
- 0.8% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-10-20). 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; Track* at high (mission-essential systems).CISA BOD 26-04: 14 days if the affected system is publicly exposed; Fix on system upgrade if it is not.Each input and its source: the SSVC and BOD 26-04 blocks below.
SSVC (CISA's decision table, applied by EchelonGraph)Track at low or medium mission impact; Track* at high (mission-essential systems).
A fix is available. Apply it within your standard update timelines.
Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (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; Fix on system upgrade if it is not.
In CISA KEV no (CISA's KEV catalog) · Automatable no (CISA Vulnrichment) · Technical impact total (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
June 2, 2023
Last Modified
May 5, 2025
Advisory Details (6)
Auto-updated Aug 27, 2026Security Vulnerabilities fixed in Firefox ESR 102.8 — Mozilla
https://www.mozilla.org/security/advisories/mfsa2023-06/Security Vulnerabilities fixed in Firefox 110 — Mozilla
https://www.mozilla.org/security/advisories/mfsa2023-05/1804640 - (CVE-2023-0767) Crash [@ sec_pkcs12_decoder_safe_bag_notify]
https://bugzilla.mozilla.org/show_bug.cgi?id=1804640Security Vulnerabilities fixed in Thunderbird 102.8 — Mozilla
https://www.mozilla.org/security/advisories/mfsa2023-07/Patch Availability(20)
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
(15 across 5 ecosystems)
Debian:10(3)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| firefox-esr | 102.1.0esr-1 ... 91.9.1esr-1~deb9u1 (185 versions) |
| — |
| nss | 2:3.42.1-1 ... 2:3.42.1-1+deb10u5 (6 versions) |
| — |
| thunderbird | 1:102.0.1-1 ... 1:91.9.0-1~deb9u1 (228 versions) |
| — |
Debian:11(3)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| firefox-esr | 102.1.0esr-1 ... 91.9.1esr-1~deb9u1 (83 versions) |
| — |
| nss | 2:3.61-1, 2:3.61-1+deb11u1, 2:3.61-1+deb11u2 |
| — |
| thunderbird | 1:102.0.1-1 ... 1:91.9.0-1~deb9u1 (105 versions) |
| — |
Debian:12(3)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| firefox-esr | — |
| — |
| nss | — |
| — |
| thunderbird | — |
| — |
Debian:13(3)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| firefox-esr | — |
| — |
| nss | — |
| — |
| thunderbird | — |
| — |
Debian:14(3)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| firefox-esr | — |
| — |
| nss | — |
| — |
| thunderbird | — |
| — |
All Vendor Advisories
(20)
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.
- Red HatRHSA-2023:1252IMPORTANT2023-02-14
RHSA-2023:1252 — Important
- Red HatRHSA-2023:1332IMPORTANT2023-02-14
RHSA-2023:1332 — Important
- Red HatRHSA-2023:1365IMPORTANT2023-02-14
RHSA-2023:1365 — Important
- Red HatRHSA-2023:1366IMPORTANT2023-02-14
RHSA-2023:1366 — Important
- Red HatRHSA-2023:1368IMPORTANT2023-02-14
RHSA-2023:1368 — Important
- Red HatRHSA-2023:1369IMPORTANT2023-02-14
RHSA-2023:1369 — Important
- Red HatRHSA-2023:1370IMPORTANT2023-02-14
RHSA-2023:1370 — Important
- Red HatRHSA-2023:1406IMPORTANT2023-02-14
RHSA-2023:1406 — Important
- Red HatRHSA-2023:1436IMPORTANT2023-02-14
RHSA-2023:1436 — Important
- Red HatRHSA-2023:1442IMPORTANT2023-02-14
RHSA-2023:1442 — Important
- Red HatRHSA-2023:1443IMPORTANT2023-02-14
RHSA-2023:1443 — Important
- Red HatRHSA-2023:1444IMPORTANT2023-02-14
RHSA-2023:1444 — Important
- Red HatRHSA-2023:1445IMPORTANT2023-02-14
RHSA-2023:1445 — Important
- Red HatRHSA-2023:1472IMPORTANT2023-02-14
RHSA-2023:1472 — Important
- Red HatRHSA-2023:1479IMPORTANT2023-02-14
RHSA-2023:1479 — Important
- Red HatRHSA-2023:1677IMPORTANT2023-02-14
RHSA-2023:1677 — Important
- UbuntuUSN-5880-1MEDIUM
Firefox vulnerabilities
- UbuntuUSN-5892-1MEDIUM
NSS vulnerabilities
- UbuntuUSN-5892-2MEDIUM
NSS vulnerability
- UbuntuUSN-5943-1MEDIUM
Thunderbird vulnerabilities
Data Freshness Timeline
(refreshed 11× in last 7d / 34× 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 94 of 192 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. 6 repeat rows among the latest 100 are merged into the row they repeat. The 98 oldest rows on record are not shown and were not checked, so the counts can still include repeats.
- 2026-10-23 16:29 UTCEPSS rescoreEPSS 0.8% · 56th percentile
- 2026-10-22 16:30 UTCEPSS rescoreEPSS 0.8% · 56th percentile
- 2026-10-21 16:29 UTCEPSS rescoreEPSS 0.8% · 56th percentile
- 2026-10-21 05:22 UTCEG score recompute
- 2026-10-21 05:22 UTCVendor advisory
- 2026-10-21 05:22 UTCGHSA enrichmentGHSA-687w-wqw8-qq8j · GitHub severity HIGH · GitHub CVSS 8.8
- 2026-10-20 16:29 UTCEPSS rescoreEPSS 0.8% · 56th percentile
- 2026-10-19 16:28 UTCEPSS rescoreEPSS 0.8% · 56th percentile
- 2026-10-18 16:29 UTCEPSS rescoreEPSS 0.8% · 56th percentile
- 2026-10-18 08:17 UTCEG score recompute
- 2026-10-17 16:29 UTCEPSS rescoreEPSS 0.8% · 56th percentile
- 2026-10-16 16:35 UTCEPSS rescoreEPSS 0.8% · 56th percentile
- 2026-10-15 16:28 UTCEPSS rescoreEPSS 0.8% · 56th percentile
- 2026-10-14 16:29 UTCEPSS rescoreEPSS 0.8% · 56th percentile
- 2026-10-14 02:54 UTCOSV refresh
- 2026-10-13 16:29 UTCEPSS rescoreEPSS 0.8% · 56th percentile
- 2026-10-12 18:39 UTCEG score recompute
- 2026-10-12 16:30 UTCEPSS rescoreEPSS 0.8% · 55th percentile
- 2026-10-11 22:03 UTCEG score recompute
- 2026-10-11 13:45 UTCEPSS rescoreEPSS 0.8% · 55th percentile
- 2026-10-10 19:57 UTCEPSS rescoreEPSS 0.8% · 55th percentile
- 2026-10-09 20:05 UTCEPSS rescoreEPSS 0.8% · 55th percentile
- 2026-10-08 17:05 UTCEPSS rescoreEPSS 0.8% · 55th percentile
- 2026-10-07 23:45 UTCEPSS rescoreEPSS 0.8% · 55th percentile
- 2026-10-06 15:14 UTCEPSS rescoreEPSS 0.8% · 55th percentile
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- 2026-10-05 17:40 UTCEPSS rescoreEPSS 0.8% · 55th percentile
- 2026-10-04 23:19 UTCEPSS rescoreEPSS 0.8% · 55th percentile
- 2026-10-03 14:23 UTCEPSS rescoreEPSS 0.8% · 55th percentile
- 2026-09-30 16:14 UTCEG score recompute
- 2026-09-30 15:01 UTCEPSS rescoreEPSS 0.8% · 55th percentile
- 2026-09-27 13:42 UTCEPSS rescoreEPSS 0.8% · 55th percentile
- 2026-09-26 15:55 UTCEPSS rescoreEPSS 0.8% · 55th percentile
- 2026-09-26 00:22 UTCEPSS rescoreEPSS 0.8% · 55th percentile
- 2026-09-24 14:00 UTCEPSS rescoreEPSS 0.8% · 55th percentile
- 2026-09-23 13:45 UTCEPSS rescoreEPSS 0.8% · 55th percentile
- 2026-09-23 10:23 UTCOSV refresh
- 2026-09-20 20:13 UTCEPSS rescoreEPSS 0.8% · 55th percentile
- 2026-09-16 14:05 UTCEPSS rescoreEPSS 0.8% · 55th percentile
- 2026-09-16 05:11 UTCEPSS rescoreEPSS 0.8% · 55th percentile
- 2026-09-15 03:07 UTCEPSS rescoreEPSS 0.8% · 55th percentile
- 2026-09-13 16:44 UTCEPSS rescoreEPSS 0.8% · 55th percentile
- 2026-09-11 14:50 UTCEPSS rescoreEPSS 0.8% · 55th percentile
- 2026-09-11 09:34 UTCEPSS rescoreEPSS 0.8% · 55th percentile
- 2026-09-08 21:57 UTCEPSS rescoreEPSS 0.8% · 54th percentile
- 2026-09-07 15:59 UTCEPSS rescoreEPSS 0.8% · 54th percentile
- 2026-09-06 13:45 UTCEPSS rescoreEPSS 0.8% · 54th percentile
- 2026-09-05 15:25 UTCEPSS rescoreEPSS 0.8% · 54th percentile
- 2026-09-04 13:57 UTCEPSS rescoreEPSS 0.8% · 54th percentile
- 2026-09-04 05:04 UTCEPSS rescoreEPSS 0.8% · 54th percentile
- 2026-09-04 04:59 UTCOSV refresh
- 2026-09-02 14:09 UTCEPSS rescoreEPSS 0.8% · 54th percentile
- 2026-09-01 13:51 UTCEPSS rescoreEPSS 0.8% · 54th percentile
- 2026-08-30 19:15 UTCEPSS rescoreEPSS 0.8% · 54th percentile
- 2026-08-30 01:19 UTCEPSS rescoreEPSS 0.8% · 54th percentile
- 2026-08-28 21:38 UTCEPSS rescoreEPSS 0.8% · 54th percentile
- 2026-08-27 14:22 UTCEPSS rescoreEPSS 0.8% · 54th percentile
- 2026-08-26 14:43 UTCEPSS rescoreEPSS 0.8% · 54th percentile
- 2026-08-25 13:46 UTCEPSS rescoreEPSS 0.8% · 54th percentile
- 2026-08-23 00:17 UTCEPSS rescoreEPSS 0.8% · 54th percentile
- 2026-08-21 23:46 UTCEPSS rescoreEPSS 0.8% · 54th percentile
- 2026-08-20 22:53 UTCEPSS rescoreEPSS 0.8% · 54th percentile
- 2026-08-19 17:01 UTCEPSS rescoreEPSS 0.8% · 54th percentile
- 2026-08-18 13:45 UTCEPSS rescoreEPSS 0.8% · 54th percentile
- 2026-08-17 15:59 UTCOSV refresh
- 2026-08-17 13:44 UTCEPSS rescoreEPSS 0.8% · 54th percentile
- 2026-08-16 14:53 UTCEPSS rescoreEPSS 0.8% · 54th percentile
- 2026-08-16 02:12 UTCEPSS rescoreEPSS 0.8% · 54th percentile
- 2026-08-15 01:27 UTCEPSS rescoreEPSS 0.8% · 54th percentile
- 2026-08-13 21:58 UTCEPSS rescoreEPSS 0.8% · 53rd percentile
- 2026-08-12 13:48 UTCEPSS rescoreEPSS 0.8% · 53rd percentile
- 2026-08-09 13:44 UTCEPSS rescoreEPSS 0.8% · 53rd percentile
- 2026-08-08 16:34 UTCEPSS rescoreEPSS 0.8% · 53rd percentile
- 2026-08-07 16:24 UTCEPSS rescoreEPSS 0.8% · 53rd percentile
- 2026-08-06 13:44 UTCEPSS rescoreEPSS 0.8% · 53rd percentile
- 2026-08-05 19:15 UTCEPSS rescoreEPSS 0.8% · 53rd percentile
- 2026-08-04 15:07 UTCEPSS rescoreEPSS 0.8% · 53rd percentile
- 2026-08-04 10:35 UTCEPSS rescoreEPSS 0.8% · 53rd percentile
- 2026-08-03 10:33 UTCEPSS rescoreEPSS 0.8% · 53rd percentile
- 2026-08-02 11:27 UTCOSV refresh
- 2026-08-02 02:24 UTCEPSS rescoreEPSS 0.8% · 53rd percentile
- 2026-08-01 04:13 UTCEPSS rescoreEPSS 0.8% · 53rd percentile
- 2026-07-30 16:25 UTCEPSS rescoreEPSS 0.8% · 53rd percentile
- 2026-07-30 01:28 UTCEPSS rescoreEPSS 0.8% · 53rd percentile
- 2026-07-28 15:34 UTCEPSS rescoreEPSS 0.8% · 53rd percentile
- 2026-07-26 14:52 UTCEPSS rescoreEPSS 0.8% · 53rd percentile
- 2026-07-25 14:16 UTCEPSS rescoreEPSS 0.8% · 53rd percentile
- 2026-07-24 14:15 UTCEPSS rescoreEPSS 0.8% · 53rd percentile
- 2026-07-23 14:16 UTCEPSS rescoreEPSS 0.8% · 53rd percentile
- 2026-07-23 02:17 UTCEG score recompute
- 2026-07-22 23:05 UTCEG score recompute
- 2026-07-22 14:06 UTCEPSS rescoreEPSS 0.8% · 53rd percentile
- 2026-07-21 15:23 UTCEPSS rescoreEPSS 0.8% · 53rd percentile
- 2026-07-20 17:05 UTCEPSS rescoreEPSS 0.8% · 53rd percentile
- 2026-07-19 14:29 UTCEPSS rescoreEPSS 0.8% · 53rd percentile
Related CVEs(same product + same vendor)
Same product
10 shownDebian:10:nss
Same vendor
10 shownredhat:RHSA-2023:1442 · ubuntu:USN-5880-1
Frequently asked(5)
What is CVE-2023-0767?
When was the CVE record for CVE-2023-0767 published?
Is CVE-2023-0767 actively exploited?
What is the CVSS score of CVE-2023-0767?
How do I remediate CVE-2023-0767?
Dependency Blast Radius
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