CVE-2023-4863: Heap buffer overflow in libwebp in Google Chrome prior to 116.0.5845.187 and libwebp 1.3.2 allowed a remote attacker to perform an out of…
Noroxi assessment
Priority: Now (action score 95/100)
- CISA has confirmed exploitation in the wild (Sep 13, 2023). Remediation deadline for US federal agencies: Oct 4, 2023.
- Probability of exploitation in the next 30 days: 99.9% (FIRST EPSS); higher than 99.9% of all records.
- Anyone who can reach it over the internet can trigger it. No account or password is required. A user must open a link or visit a page. No special conditions are required; it is repeatable.
- Fixed version: firefox (AlmaLinux:8) 102.15.1-1.el8_8.alma; libwebp (AlmaLinux:8) 1.0.0-8.el8_8.1; libwebp-devel (AlmaLinux:8) 1.0.0-8.el8_8.1.
- Mentioned 4 times in Turkish national cyber security advisories (siberguvenlik.gov.tr).
Patch today or shut off access. Upgrade to firefox (AlmaLinux:8) 102.15.1-1.el8_8.alma; libwebp (AlmaLinux:8) 1.0.0-8.el8_8.1; libwebp-devel (AlmaLinux:8) 1.0.0-8.el8_8.1 or later.
Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it
Primary sources: NVD · CVE.org · CISA KEV · FIRST EPSS
Heap buffer overflow in libwebp in Google Chrome prior to 116.0.5845.187 and libwebp 1.3.2 allowed a remote attacker to perform an out of bounds memory write via a crafted HTML page. (Chromium security severity: Critical)
- BDU:2023-05510
- GHSA-j7hp-h8jx-5ppr
- ALSA-2023:5184
- ALSA-2023:5200
- ALSA-2023:5201
- ALSA-2023:5214
- ALSA-2023:5224
- ALSA-2023:5309
- DLA-3568-1
- DLA-3569-1
- DLA-3570-1
- DSA-5496-1
- DSA-5497-1
- DSA-5497-2
- DSA-5498-1
- openSUSE-SU-2023:0246-1
- openSUSE-SU-2023:0247-1
- openSUSE-SU-2023:0278-1
- openSUSE-SU-2024:13227-1
- openSUSE-SU-2024:13228-1
- Published
- Sep 12, 2023
- Updated
- Jun 17, 2026
- EPSS
- 99.9% · 99th percentile
- CWE
- CWE-787
Report tools
Action score
95
Patch today or shut off access.
- CVSS
- 35 / 40 · 8.8 / 10
- CISA KEV
- 30 / 30 · Listed
- EPSS
- 30 / 30 · 99.9%
CISA SSVC decision
- Exploitation
- active
- Automatable
- no
- Technical impact
- total
Vulnrichment: CISA's decision-tree inputs.
Actively exploited in the wild
CISA added this to its Known Exploited Vulnerabilities catalog on Sep 13, 2023. That signals real attacks, not theory.
Remediation deadline for US federal agencies: Oct 4, 2023.
Get told when this record changes
- In CISA KEV: exploitation in the wild confirmed
- Weaponized exploit exists
- A fix has been released
If any of these changes, we'll tell you in the daily email digest.
Is your version affected? Check itNoroxi analysis
What does it mean in your environment?
The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.
We use this product, ask for helpAffected systems
Is your version affected?
Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.
| Vendor | Product | CPE |
|---|---|---|
| chrome | cpe:2.3:a:google:chrome | |
| fedoraproject | fedora | cpe:2.3:o:fedoraproject:fedora |
| debian | debian linux | cpe:2.3:o:debian:debian_linux |
| mozilla | firefox | cpe:2.3:a:mozilla:firefox |
| mozilla | thunderbird | cpe:2.3:a:mozilla:thunderbird |
| microsoft | edge chromium | cpe:2.3:a:microsoft:edge_chromium |
| microsoft | teams | cpe:2.3:a:microsoft:teams |
| microsoft | webp image extension | cpe:2.3:a:microsoft:webp_image_extension |
| webmproject | libwebp | cpe:2.3:a:webmproject:libwebp |
| netapp | active iq unified manager | cpe:2.3:a:netapp:active_iq_unified_manager |
| bentley | seequent leapfrog | cpe:2.3:a:bentley:seequent_leapfrog |
| bandisoft | honeyview | cpe:2.3:a:bandisoft:honeyview |
Versions reported by the vendor
Affected version ranges reported by the assigning authority (Chrome). Independent of NVD's CPE analysis and usually ahead of it.
Google Chrome
- 116.0.5845.187 and later · before 116.0.5845.187affected
Google libwebp
- 1.3.2 and later · before 1.3.2affected
Affected versions · NVD (20)
NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.
- bandisoft honeyviewbefore 5.51
- bentley seequent leapfrogbefore 2023.2
- debian debian linux10.0
- debian debian linux11.0
- debian debian linux12.0
- fedoraproject fedora37
- fedoraproject fedora38
- fedoraproject fedora39
- google chromebefore 116.0.5845.187
- microsoft edge chromiumbefore 116.0.1938.81
- microsoft teamsbefore 1.6.00.26463
- microsoft teamsbefore 1.6.00.26474
- microsoft webp image extensionbefore 1.0.62681.0
- mozilla firefoxbefore 102.15.1
- mozilla firefoxbefore 117.0.1
- mozilla firefox115.1.0 and later · before 115.2.1
- mozilla thunderbird115.0 and later · before 115.2.2
- mozilla thunderbirdbefore 102.15.1
- netapp active iq unified managerall versions
- webmproject libwebpbefore 1.3.2
Package-level exposure
OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.
| Ecosystem | Package | Affected range | Fix |
|---|---|---|---|
| AlmaLinux:8 | firefox | before 102.15.1-1.el8_8.alma | 102.15.1-1.el8_8.alma |
| AlmaLinux:8 | libwebp | before 1.0.0-8.el8_8.1 | 1.0.0-8.el8_8.1 |
| AlmaLinux:8 | libwebp-devel | before 1.0.0-8.el8_8.1 | 1.0.0-8.el8_8.1 |
| AlmaLinux:8 | thunderbird | before 102.15.1-1.el8_8.alma | 102.15.1-1.el8_8.alma |
| AlmaLinux:9 | firefox | before 102.15.1-1.el9_2.alma | 102.15.1-1.el9_2.alma |
| AlmaLinux:9 | firefox-x11 | before 102.15.1-1.el9_2.alma | 102.15.1-1.el9_2.alma |
| AlmaLinux:9 | libwebp | before 1.2.0-7.el9_2 | 1.2.0-7.el9_2 |
| AlmaLinux:9 | libwebp-devel | before 1.2.0-7.el9_2 | 1.2.0-7.el9_2 |
| AlmaLinux:9 | libwebp-tools | before 1.2.0-7.el9_2 | 1.2.0-7.el9_2 |
| AlmaLinux:9 | thunderbird | before 102.15.1-1.el9_2.alma | 102.15.1-1.el9_2.alma |
| Alpine:v3.15 | libwebp | before 1.2.2-r2 | 1.2.2-r2 |
| Alpine:v3.16 | libwebp | before 1.2.3-r2 | 1.2.3-r2 |
| Alpine:v3.17 | libwebp | before 1.2.4-r3 | 1.2.4-r3 |
| Alpine:v3.18 | chromium | before 116.0.5845.187-r0 | 116.0.5845.187-r0 |
| Alpine:v3.18 | firefox-esr | before 115.2.1-r0 | 115.2.1-r0 |
| Alpine:v3.18 | libwebp | before 1.3.1-r1 | 1.3.1-r1 |
| Alpine:v3.18 | qt5-qtimageformats | before 5.15.9_git20230407-r2 | 5.15.9_git20230407-r2 |
| Alpine:v3.18 | qt5-qtwebengine | before 5.15.13-r7 | 5.15.13-r7 |
| Alpine:v3.19 | qt5-qtimageformats | before 5.15.10_git20230612-r1 | 5.15.10_git20230612-r1 |
| Alpine:v3.19 | qt5-qtwebengine | before 5.15.15-r1 | 5.15.15-r1 |
| crates.io | libwebp-sys | from 0.0.0-0 · before 0.9.3 | 0.9.3 |
| crates.io | libwebp-sys | before 0.9.3 | 0.9.3 |
| crates.io | libwebp-sys2 | from 0.0.0-0 · before 0.1.8 | 0.1.8 |
| crates.io | libwebp-sys2 | before 0.1.8 | 0.1.8 |
+96
Same product
google: all recordsOther highest-scoring records for the same primary product.
- CVE-2021-21224Type confusion in V8 in Google Chrome prior to 90.0.4430.85 allowed a remote attacker to execute arbitrary code inside a sandbox via a…KEV90Now
- CVE-2018-17463Incorrect side effect annotation in V8 in Google Chrome prior to 70.0.3538.64 allowed a remote attacker to execute arbitrary code inside a…KEV90Now
- CVE-2020-6418Type confusion in V8 in Google Chrome prior to 80.0.3987.122 allowed a remote attacker to potentially exploit heap corruption via a crafted…KEV89Now
Published before and after this one in the same product
- ← EarlierCVE-2023-4763Sep 5, 2023 · Use after free in Networks in Google Chrome prior to 116.0.5845.179 allowed a remote attacker to potentially exploit heap corruption via a…35Monitor
- ← EarlierCVE-2023-4764Sep 5, 2023 · Incorrect security UI in BFCache in Google Chrome prior to 116.0.5845.179 allowed a remote attacker to spoof the contents of the Omnibox…26Monitor
- Later →CVE-2023-4900Sep 12, 2023 · Inappropriate implementation in Custom Tabs in Google Chrome on Android prior to 117.0.5938.62 allowed a remote attacker to obfuscate a…17Monitor
Remediation
Which version to upgrade to
Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.
| Product / package | Fixed version | Source |
|---|---|---|
| almalinux:firefox | 102.15.1-1.el8_8.alma · AlmaLinux:8 | Package registry (OSV) |
| almalinux:firefox-x11 | 102.15.1-1.el9_2.alma · AlmaLinux:9 | Package registry (OSV) |
| almalinux:libwebp | 1.2.0-7.el9_2 · AlmaLinux:9 | Package registry (OSV) |
| almalinux:libwebp-devel | 1.2.0-7.el9_2 · AlmaLinux:9 | Package registry (OSV) |
| almalinux:libwebp-tools | 1.2.0-7.el9_2 · AlmaLinux:9 | Package registry (OSV) |
| almalinux:thunderbird | 102.15.1-1.el8_8.alma · AlmaLinux:8 | Package registry (OSV) |
| alpine:chromium | 116.0.5845.187-r0 · Alpine:v3.18 | Package registry (OSV) |
| alpine:firefox-esr | 115.2.1-r0 · Alpine:v3.18 | Package registry (OSV) |
| alpine:libwebp | 1.2.2-r2 · Alpine:v3.15 | Package registry (OSV) |
| alpine:qt5-qtimageformats | 5.15.9_git20230407-r2 · Alpine:v3.18 | Package registry (OSV) |
| alpine:qt5-qtwebengine | 5.15.13-r7 · Alpine:v3.18 | Package registry (OSV) |
| crates.io:libwebp-sys | 0.9.3 | Package registry (OSV) |
| crates.io:libwebp-sys2 | 0.1.8 | Package registry (OSV) |
| crates.io:webp | 0.2.6 | Package registry (OSV) |
| debian:chromium | 117.0.5938.62-1 · Debian:12 | Package registry (OSV) |
| debian:firefox-esr | 102.15.1esr-1~deb12u1 · Debian:12 | Package registry (OSV) |
| debian:libwebp | 1.2.4-0.2+deb12u1 · Debian:12 | Package registry (OSV) |
| debian:thunderbird | 1:102.15.1-1~deb12u1 · Debian:12 | Package registry (OSV) |
| Go:github.com/chai2010/webp | 0.0.0-20250406010349-76805d5a8860 | Package registry (OSV) |
| Go:github.com/chai2010/webp | 1.1.2-0.20250406010349-76805d5a8860 | Package registry (OSV) |
| Go:github.com/chai2010/webp | 1.4.0 | Package registry (OSV) |
| npm:electron | 22.3.24 | Package registry (OSV) |
| npm:electron | 24.8.3 | Package registry (OSV) |
| npm:electron | 25.8.1 | Package registry (OSV) |
| npm:electron | 26.2.1 | Package registry (OSV) |
| npm:electron | 27.0.0-beta.2 | Package registry (OSV) |
| NuGet:magick.net-q16-anycpu | 13.3.0 | Package registry (OSV) |
| NuGet:magick.net-q16-hdri-anycpu | 13.3.0 | Package registry (OSV) |
| NuGet:magick.net-q16-x64 | 13.3.0 | Package registry (OSV) |
| NuGet:magick.net-q8-anycpu | 13.3.0 | Package registry (OSV) |
+42
Exploit status
Weaponized
A ready exploit tool or active in-the-wild use is known for this vulnerability. This should be your top priority.
Evidence
- Proof-of-concept repository on GitHub ×15
Noroxi does not host or link to exploit code. Metasploit module names and Nuclei template ids are shown (names, not code); Exploit-DB entries and PoC repositories are given as counts only.
| Source | Kind | Date |
|---|---|---|
| Proof-of-concept repository on GitHub | 15 repositories | 2023-09-21 → 2026-11-09 |
Research context
For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.
Timeline
From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.
- Published
- CISA KEV+1 d
- First PoC+9 d
- TodayNov 12, 2026+1157 d
Patch and commit links
Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.
National notice (Türkiye Cybersecurity Directorate / USOM)
Official security notices citing this record; remediation advice is on the agency's page.
- TR-23-0675 · Dec 5, 2023(Google Android Güvenlik Güncellemesi)
- TR-23-0666 · Nov 29, 2023(Google Chrome Güvenlik Bildirimi)
- TR-23-0561 · Sep 28, 2023(Google Chrome Güvenlik Bildirimi)
- TR-23-0519 · Sep 13, 2023(Google Chrome Güvenlik Bildirimi)
Not on record for this CVE: EPSS history · researcher credit · variant or chain candidate · public bounty program.
Technical details
Attack conditions
- Anyone who can reach it over the internet can trigger it.
- No account or password is required.
- A user must open a link or visit a page.
- No special conditions are required; it is repeatable.
If successful
- Confidentiality
- high · data can be read
- Integrity
- high · data or configuration can be modified
- Availability
- high · the service can be disrupted
- Attack vector
- Network
- Attack complexity
- Low
- Privileges required
- None
- User interaction
- Required
- Scope
- Unchanged
- Confidentiality impact
- High
- Integrity impact
- High
- Availability impact
- High
Weakness class (CWE)
CWE-787 · Out-of-bounds WriteCVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
nvd-primary
Attack context
MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.
MITRE has no CAPEC/ATT&CK mapping for this CWE.
Change log (1)
- Fix✗ → ✓
For records you follow, these changes also arrive as notifications. →
References
Show all references (19 more)Show less
- www.openwall.com/lists/oss-security/2023/09/21/4
- www.openwall.com/lists/oss-security/2023/09/22/1
- www.openwall.com/lists/oss-security/2023/09/22/3
- www.openwall.com/lists/oss-security/2023/09/22/4
- www.openwall.com/lists/oss-security/2023/09/22/5
- www.openwall.com/lists/oss-security/2023/09/22/6
- www.openwall.com/lists/oss-security/2023/09/22/7
- www.openwall.com/lists/oss-security/2023/09/22/8
- www.openwall.com/lists/oss-security/2023/09/26/1
- www.openwall.com/lists/oss-security/2023/09/26/7
- www.openwall.com/lists/oss-security/2023/09/28/1
- www.openwall.com/lists/oss-security/2023/09/28/2
- www.openwall.com/lists/oss-security/2023/09/28/4
- adamcaudill.com/2023/09/14/whose-cve-is-it-anyway/
- bugzilla.suse.com/show_bug.cgi?id=1215231
- chromereleases.googleblog.com/2023/09/stable-channel-update-for-desktop_11.html
- crbug.com/1479274
- en.bandisoft.com/honeyview/history/
- github.com/webmproject/libwebp/commit/902bc9190331343b2017211debcec8d2ab87e17a
Vendor advisories and official records. Exploit/PoC links are deliberately left out.