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  3. I'm curious to know what people think about Anthropic's claim that Claude found 500 high-severity vulnerabilities in open-source packages.

I'm curious to know what people think about Anthropic's claim that Claude found 500 high-severity vulnerabilities in open-source packages.

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  • Dan GoodinD Dan Goodin

    I'm curious to know what people think about Anthropic's claim that Claude found 500 high-severity vulnerabilities in open-source packages. Has anyone confirmed that these vulns were indeed high-severity and hadn't been discovered before? Is this development as big a deal as Anthropic says? Any other critiques?

    https://red.anthropic.com/2026/zero-days/

    Brandon RobertsB This user is from outside of this forum
    Brandon RobertsB This user is from outside of this forum
    Brandon Roberts
    wrote last edited by
    #9

    @dangoodin Gonna go out on a limb here and posit that Claude Code is creating vulns at a much faster rate πŸ˜‚

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    • Dan GoodinD Dan Goodin

      I'm curious to know what people think about Anthropic's claim that Claude found 500 high-severity vulnerabilities in open-source packages. Has anyone confirmed that these vulns were indeed high-severity and hadn't been discovered before? Is this development as big a deal as Anthropic says? Any other critiques?

      https://red.anthropic.com/2026/zero-days/

      M This user is from outside of this forum
      M This user is from outside of this forum
      Michael Weiss
      wrote last edited by
      #10

      @dangoodin I said it elsewhere, but what's missing in my view is the false positive rate. Ok, it found 500. Did it flag 500? 5,000? 5,000,000? That's an important data point.

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      • RootWyrm πŸ‡ΊπŸ‡¦:progress:R RootWyrm πŸ‡ΊπŸ‡¦:progress:

        @dangoodin if "this commit changed a thing to fix a bug" is the metric, well fuck, I've found over 100,000 'vulnerabilities' in the past year.

        Dan GoodinD This user is from outside of this forum
        Dan GoodinD This user is from outside of this forum
        Dan Goodin
        wrote last edited by
        #11

        @rootwyrm

        That's not what Antropic said. Antropic said the vulns were high-severity.

        RootWyrm πŸ‡ΊπŸ‡¦:progress:R 1 Reply Last reply
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        • Dan GoodinD Dan Goodin

          @rootwyrm

          That's not what Antropic said. Antropic said the vulns were high-severity.

          RootWyrm πŸ‡ΊπŸ‡¦:progress:R This user is from outside of this forum
          RootWyrm πŸ‡ΊπŸ‡¦:progress:R This user is from outside of this forum
          RootWyrm πŸ‡ΊπŸ‡¦:progress:
          wrote last edited by
          #12

          @dangoodin that is EXACTLY what Anthropic said. LITERALLY it is the FIRST "vulnerability" they bogusly claim to have found.

          > Neither of these methods yielded any significant findings. Eventually, however, Claude took a different approach: reading the Git commit history. Claude quickly found a security-relevant commit, and commented:

          Dan GoodinD RootWyrm πŸ‡ΊπŸ‡¦:progress:R 2 Replies Last reply
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          • Dan GoodinD Dan Goodin

            I'm curious to know what people think about Anthropic's claim that Claude found 500 high-severity vulnerabilities in open-source packages. Has anyone confirmed that these vulns were indeed high-severity and hadn't been discovered before? Is this development as big a deal as Anthropic says? Any other critiques?

            https://red.anthropic.com/2026/zero-days/

            Dan GoodinD This user is from outside of this forum
            Dan GoodinD This user is from outside of this forum
            Dan Goodin
            wrote last edited by
            #13

            Thanks for all the responses. So far, projects I understand to have received reports include: Ghostscript, OpenSC, lzw, and CGIF. Are others known? Links to commits that fix the vulns also appreciated.

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            • RootWyrm πŸ‡ΊπŸ‡¦:progress:R RootWyrm πŸ‡ΊπŸ‡¦:progress:

              @dangoodin that is EXACTLY what Anthropic said. LITERALLY it is the FIRST "vulnerability" they bogusly claim to have found.

              > Neither of these methods yielded any significant findings. Eventually, however, Claude took a different approach: reading the Git commit history. Claude quickly found a security-relevant commit, and commented:

              Dan GoodinD This user is from outside of this forum
              Dan GoodinD This user is from outside of this forum
              Dan Goodin
              wrote last edited by
              #14

              @rootwyrm

              Right, but the post doesn't say merely that the reports of the 500 vulns resulted in commits. It says all 500 were high-severity. If true, that would be significant, no?

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              • RootWyrm πŸ‡ΊπŸ‡¦:progress:R RootWyrm πŸ‡ΊπŸ‡¦:progress:

                @dangoodin that is EXACTLY what Anthropic said. LITERALLY it is the FIRST "vulnerability" they bogusly claim to have found.

                > Neither of these methods yielded any significant findings. Eventually, however, Claude took a different approach: reading the Git commit history. Claude quickly found a security-relevant commit, and commented:

                RootWyrm πŸ‡ΊπŸ‡¦:progress:R This user is from outside of this forum
                RootWyrm πŸ‡ΊπŸ‡¦:progress:R This user is from outside of this forum
                RootWyrm πŸ‡ΊπŸ‡¦:progress:
                wrote last edited by
                #15

                @dangoodin to which I said "hang the fuck on" and read a bit more. And hey look, it's in fonts... bounds checking...

                https://security.snyk.io/vuln/SNYK-CENTOS10-GHOSTSCRIPTTOOLSFONTS-10299121

                Dan GoodinD 1 Reply Last reply
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                • RootWyrm πŸ‡ΊπŸ‡¦:progress:R RootWyrm πŸ‡ΊπŸ‡¦:progress:

                  @dangoodin to which I said "hang the fuck on" and read a bit more. And hey look, it's in fonts... bounds checking...

                  https://security.snyk.io/vuln/SNYK-CENTOS10-GHOSTSCRIPTTOOLSFONTS-10299121

                  Dan GoodinD This user is from outside of this forum
                  Dan GoodinD This user is from outside of this forum
                  Dan Goodin
                  wrote last edited by
                  #16

                  @rootwyrm

                  CVSS is 7.8, which is high, no? That would seem to support the Anthropic's claim. What's the significance of the vulns being in fonts . . . bounds checking?

                  RootWyrm πŸ‡ΊπŸ‡¦:progress:R 1 Reply Last reply
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                  • Dan GoodinD Dan Goodin

                    I'm curious to know what people think about Anthropic's claim that Claude found 500 high-severity vulnerabilities in open-source packages. Has anyone confirmed that these vulns were indeed high-severity and hadn't been discovered before? Is this development as big a deal as Anthropic says? Any other critiques?

                    https://red.anthropic.com/2026/zero-days/

                    cerementC This user is from outside of this forum
                    cerementC This user is from outside of this forum
                    cerement
                    wrote last edited by
                    #17

                    @dangoodin

                    (on the flip side, curl ending their bug bounty program because of the flood of slop reports)

                    Hippo Giraffe CovfefeS 1 Reply Last reply
                    0
                    • cerementC cerement

                      @dangoodin

                      (on the flip side, curl ending their bug bounty program because of the flood of slop reports)

                      Hippo Giraffe CovfefeS This user is from outside of this forum
                      Hippo Giraffe CovfefeS This user is from outside of this forum
                      Hippo Giraffe Covfefe
                      wrote last edited by
                      #18

                      @cerement @dangoodin Exactly what I was going to point out.

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                      • Dan GoodinD Dan Goodin

                        @rootwyrm

                        CVSS is 7.8, which is high, no? That would seem to support the Anthropic's claim. What's the significance of the vulns being in fonts . . . bounds checking?

                        RootWyrm πŸ‡ΊπŸ‡¦:progress:R This user is from outside of this forum
                        RootWyrm πŸ‡ΊπŸ‡¦:progress:R This user is from outside of this forum
                        RootWyrm πŸ‡ΊπŸ‡¦:progress:
                        wrote last edited by
                        #19

                        @dangoodin the significance is that by their own words, they didn't discover shit. Check the date on that CVE. But they're trying to claim dishonestly that their magical almost-to-AGI stochastic parrot totally discovered it.
                        It did not. Period.

                        Dan GoodinD 1 Reply Last reply
                        0
                        • RootWyrm πŸ‡ΊπŸ‡¦:progress:R RootWyrm πŸ‡ΊπŸ‡¦:progress:

                          @dangoodin the significance is that by their own words, they didn't discover shit. Check the date on that CVE. But they're trying to claim dishonestly that their magical almost-to-AGI stochastic parrot totally discovered it.
                          It did not. Period.

                          Dan GoodinD This user is from outside of this forum
                          Dan GoodinD This user is from outside of this forum
                          Dan Goodin
                          wrote last edited by
                          #20

                          @rootwyrm

                          I'm not arguing with you. Sorry if it sounds like I am. I don't have the same technical background you do and am asking how the 7.8-severity vuln shouldn't be considered high severity because it involves fonts . . . bounds checking? I'm asking you to explain the reasoning behind your assessment as if I was a student in a security 101 class.

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